Yes you read it right. Everyone is waiting for a vaccine, but a truely time tested vaccine takes at least two to three years. Meanwhile there are many personal experiences being shared by people who have used holistic methods and recovered fully. These are brushed aside by people and agencies who believe in or have a vested interest in promoting only western medicines and drugs. Readers are also invited to watch demo videos prepared by Denanath Mangeshkar Hospital & Research Center, Pune, who protected their Covid Warriors from infection using these techniques

According to the report^​*​ published in msn.com:
As it stands, we’re several months into the pandemic, and a vaccine or cure could still be a long way off. This daunting fact has led researchers to explore other strategies for combating coronavirus, and mitigating its symptoms. Among those strategies is nasal irrigation, the practice of clearing the nasal passages, using a spray bottle or neti pot to introduce a therapeutic solution.One team of researchers recently studied the effects of nasal irrigation on COVID-19 and determined that this simple, at-home practice could very well help lessen a person’s viral load. “Nasal irrigations should be encouraged for patients and health care workers especially,” the study concludes.

Indian readers are quite aware of the procedure. The image above summarises it for readers who aren’t. Please read on. Also follow all the links if you want to know more.

While hardly a silver bullet solution for the disease, the study argues that nasal irrigation can help to “reduce viral severity and further transmission” of coronavirus early on after a patient becomes infected. The researchers explain that this is because, “similar to other viral upper respiratory infections, [coronavirus] infection occurs primarily in the nasal and nasopharyngeal mucosa with high viral loads early in disease.” This presents an opportunity to “wash COVID-19 away,” the study suggests.

An Important advice To make Neti practice safe use filtered or distilled lukewarm salted water as suggested by Yoga ancient texts of India. The temperature of the water should be around the temperature of the blood and after doing neti one should practice kapalbhati (i.e blowing air gently from the nose to expel residual water). And to be on a safer side if you are practicing neti for the first time, do it under the guidance of a practitioner.

The researchers noted that the general “benefit of topical nasal saline has been well established,” explaining that the nasal lining serves an important role in the immune system, acting as the primary defense against inhaled viruses and bacteria. Nasal rinses help remove this particulate matter, while also increasing hydration and reducing inflammation—all of which can lessen the effects of a respiratory infection.

So what exactly do you need in order to try it out? The study suggested choosing an over-the-counter hypertonic saline spray, which can be found in most pharmacies. Betadine and other iodine-derivative sprays also appear to support “substantial coronavirus reduction,” the researchers noted.

While there is no cure for coronavirus, this at-home treatment may help to limit the severity of your illness, and reduce your time spent sick—and that’s certainly a step in the right direction. And for more on this simple practice, check out 

Nasal Irrigation Is the Key to Reducing COVID-19 Progression, Doctor Says.

A Panel Discussion was held on Lok Sabha TV at 1 PM and 4 PM on the 24th of January 2020 to discuss provisions for Water in Ms. Nirmala Sitaraman’s Budget Session in Lok Sabha due on 1st February. The Program was anchored by Parakram Singh Shekhawat. The panelists were Arun Tiwari, Manohar Khushalani and Himanshu Thakkar. They all went into their expectations from the budget with respect to Budget Provisions for Jal Shakti – Water. 

The anchor began the discussion with a small introduction of the Ministry of water resources (Jal Shakti Mantraley), Mr. Gajendra Singh Shekhawat, the troubled state of water quality and availability through the country, and its ever arising complications. Mr. Arun Tiwari elaborated on our lack of efforts in successfully harvesting rainwater and sustaining groundwater levels, highlighting the lack of regulations surrounding these harvesting methods. The importance of sustainability was highlighted as well unless groundwater is recharged, regulated and the focus needs to be shifted to Sustainability. 

The Ministry of Drinking Water and Sanitation, Ministry of Water Resources and Ganga Rejuvenation have been merged into the Jal Shakti Ministry under the second term of the Modi government and the Jal Shakti Ministry was allocated Rs 28,261 Crore, an 8% increase. A 10 pointer vision for the next decade was listed out by the Finance Minister Nirmala Sitharaman. She elaborated that the Jal Shakti Ministry will manage the country’s water resources and water supply in an integrated holistic manner, and will work towards supplying all rural households with water supply by 2024. In the LSTV discussion, Manohar brought forward a set of important points such as the minimal increase in the budget allocated, the unsanitary sewage system, and lack of stormwater drains. He also insisted that along with budget allocation, our national lakes need to be taken care of efficiently and resurrected, and the need for the development of rural handicrafts and the need for a River Basin Authority, for the systematic distribution of water. 

The Atal Bhujal Yojna, is a scheme, also known as ‘Atal Jal’ will promote panchayat-led groundwater management and behavioral change with a primary focus on demand-side management. The scheme is aimed at

• doubling farmers’ incomes,
• promoting participatory groundwater management,
• improving water use efficiency on a mass scale,
• improving cropping pattern and
• promoting efficient and equitable use of groundwater resources and
• behavioral change at the community level.

Official estimates state that over INR 9 crores (90 million) toilets were constructed from 2014 when the Swacch Bharat Mission was launched under the Modi government as one of its flagship schemes. Yet, a government survey in 2017 showed that 6 out of 10 toilets built under the Swacch Bharat Mission did not have water supply, and were hence unusable.

The chemical fertilizer farming is allocated INR 80,000crores, while the green revolution farmers are allotted INR12,000crores but the Organic manure farming is allocated only INR 2 Crore, Manohar Khushalani pointed out, the obvious lack of financial support to organic farmers led to Cancer and other diseases in the cities of Punjab and Harayana, he insisted on the importance of WaterShed Management, an initiative taken by Anna Hazare previously. 

The discussion shed light upon various important aspects of Budget allocation for water conservation and also examined the various areas where more efforts are required for sustainability.

You can watch the informative debate here.

You will find more details on the next debate on LSTV on the topic of Atal Bhujal Yojna, Please find the entire debate here.

Exactly two months ago, on 17th March 2020 In a perceptive article, author Maiti Bibhansu, wrote in Times of India about the subtle science of Microvita. First proposed by P.R Sarcar, 34 years ago, it has a great relevance to the mysterious pandemic, Coronavirus, baffling scientists all over the world.

Bibhansu writes: Coronovirus has become a severe threat to this planet earth. It is spreading like wildfire. WHO has declared a health emergency. Still, there is no proper treatment to fight it.

In the year 1986, the great spiritual master and philosopher Shri P R Sarkar aka Shri Shri Anandamurti wrote a book, “Microvita in a nutshell”. This book has a link to some viruses like coronavirus. Sarkar is of the opinion that the smallest particle of matter or an element is not an atom, electron or proton but a microvitum or microvita in the plural. Microvita exists in both physical and psychic realms. Physically they are smaller than a sub-atomic particle and in the psychic realm, they are subtler than ectoplasm. These microvita belong to three categories—positive or friendly microvita, negative or harmful microvita and neutral microvita.

According to the Dutch microvita researcher Henk de Weijer “Microvita are tiny creative catalysing agents. They build atoms of matter, biology and mind while cooperating with the characteristics of subatomic particles and pure energy”.

Starting from the basic concept expressed by Sarkar in his discourses, the scholar Richard Gautier highlighted the involvement of microvita in the organization of energy for the creation and maintenance of structures. He wrote: “…without microvita, no physical structure can exist. This is because, without microvita, energy or prana cannot be organized to become vital energy and create or maintain the existence of a structure.”

In connection with Quantum Field Theory, another researcher from the Netherlands, Frank van den Bovenkamp, suggests that the scalar field (a special type of quantum field) not only gives mass to elementary particles but on top of that produces subtle vibrations which appear to possess certain characteristics of microvita. This inner, simultaneous state of the all-pervading scalar field is reminiscent of P.R. Sarkar’s philosophical concept of “Trigunatmika”, also referred to as the Causal Matrix, and has no reality in the absolute sense but is superior to its effects and is inferred by them.

Reacting to the article, Richard Gauthier a researcher and Physics instructor, from Santa Rosa Junior College, California, USA, wrote: “This is a very nice article about microvita and their potential for helping society in these difficult times. I have been researching microvita for more than 30 years. some of my articles on microvita and science can be found at: richardgauthier(dot)academia(dot)edu(slash) research.

“My latest research”, he adds, “is about Microvita and the Origin of the Universe. You can find a PowerPoint for this article “superluminal primordial information quanta (sprinqs) created and compose a multiverse of equally fine-tuned universes evolving life and highly-developed minds” at the above location in the presentations section. I encourage interested people to find out more about microvita and to read P.R. Sarkar’s original article about microvita at microvita(dot)org. Read from source at the link below:

https://timesofindia.indiatimes.com/readersblog/understanding-yoga/coronavirus-and-p-r-sarkars-intuitional-science-of-microvita-10638/

We have been reading about UFOs for decades now. The topic came again into limelight when Pentagon admitted that some videos which were doing the rounds for a few years were genuine and neither fake nor tampered with. On 2nd May, 2020, the TV Channel, Times Now, conducted a debate on the UFO Mystery in it’s program India Upfront anchored by Rahul Shivshankar. The three panelists in the program were; Prof. Manohar Khushalani, Somak Raychaudhury & Amitabha Ghosh. On its twitter account Times Now tweeted the entire discourse by Manohar Khushalani in this tweet. Lets first listen to that on Twitter:

Since you’ve seen part of the debate in this video, you would also appreciate that there was not enough time to go into this exciting topic in detail. My intention is to expand my point of view in a series of articles beginning with this one – Part I of the series. Also in Part II we will share the complete debate, so that we can get our co participants viewpoints across as well. To begin with, lets look at the sequence of events as reported by BBC ^​*​

The US Department of Defense has released three declassified videos of what it now calls an “Unexplained Aerial Phenomena” – the new nomenclature for UFOs

The Pentagon said it wanted to “clear up any misconceptions by the public on whether or not the footage that has been circulating was real”.

In its statement, the Pentagon said: “After a thorough review, the department has determined that the authorised release of these unclassified videos does not reveal any sensitive capabilities or systems, and does not impinge on any subsequent investigations of military air space incursions by Unidentified Aerial Phenomena.

“DOD [Department of Defense] is releasing the videos in order to clear up any misconceptions by the public on whether or not the footage that has been circulating was real, or whether or not there is more to the videos. The aerial phenomena observed in the videos remain characterized as ‘unidentified’.”

The videos had already been leaked in 2007 and 2017.

Two were published by the New York Times^​†​, while the third was leaked by an organisation, To the Stars Academy of Arts and Sciences, co-founded by former vocalist Tom DeLonge. The musician co-founded the academy in 2017 in order to study UFOs and other paranormal phenomena.

Tweeting about the release, DeLonge thanked shareholders in his organisation, and said “I am hoping to fund further research into the objects.”

“With today’s events and articles on my and @TTSAcademy’s efforts to get the US Gov to start the grand conversation, I want to thank every share holder for believing in us,” he said.

“Next, we plan on pursuing the technology, finding more answers and telling the stories.”

Many people surmised at that time that there were alien’s navigating those Unidentified Flying Objects (UFOs).

According to the New York Times, the clip from 2004 was filmed by two navy fighter pilots and shows a round object hovering above the water, about 100 miles (160 km) out into the Pacific Ocean.

Two other videos filmed in 2015 show objects moving through the air, one of which is spinning. In one, a pilot is heard saying: “Look at that thing, dude! It’s rotating!”

Let’s look at these videos described above

Obviously these aerial objects were not following any known laws of Newtonian physics . This author^​‡​ has always held that many new laws of dynamics are yet to be discovered or harnessed. One of them is Gravity. Yes we use Gravity of heavenly bodies to catapult or alter the course of rockets and satellites, enabling them to wander into the universe. This technique helps to save fuel and helps the spacecraft to remain navigable for a longer time. Hence Gravity is a force, a form of energy which is so powerful that it can hold Gigantic Planets, Suns and Stars together.

Yet my colleagues in the debate on Times Now program probably felt that if they were UFOs then they were to follow the same laws of physics which purportedly governed the rocket science of contemporary Space agencies like NASA. ISRO, Roscosmos and CNSA. Yes these Agencies have done remarkable work in outer space, but we are infants of science, if you compare yourself with the unimaginable size and extent of the Universe, and our place in it.

As beautifully put by Jonathan Marcus ^​§​ , “The fascination with the unexplained never goes away. And the UFO phenomenon is perhaps one of the most potent of these stories, linking uncertainty about worlds beyond our own to conspiracy theories about government and especially the US government. Down the centuries people have looked to the sky and tried to explain mysterious lights and objects.”

Roswell, New Mexico, currently known mostly through myths about aliens and UFOs, is a major Tourist destination with plethora of tourist attractions, skywalk and UFO museums, art galleries, Alien Zones, Inns and Hotels, was a little known place in 1947. It catapulted to fame when One morning around Independence Day 1947, about 75 miles from the town of Roswell, a rancher named Mac Brazel found something unusual in his sheep pasture: a mess of metallic sticks held together with tape; chunks of plastic and foil reflectors; and scraps of a heavy, glossy, paper-like material. Unable to identify the strange objects, Brazel called Roswell’s sheriff. The sheriff, in turn, called officials at the nearby Roswell Army Air Force base. Soldiers fanned out across Brazel’s field, gathering the mysterious debris and whisking it away in armored trucks. The farmer’s discovered debris, was initially described as a flying saucer, by the local media.

On July 8, “RAAF Captures Flying Saucer on Ranch in Roswell Region” was the top story in the Roswell Daily Record. But was it true? On July 9, an Air Force official clarified the paper’s report: The alleged “flying saucer,” he said, was only a crashed weather balloon, but later it emerge that it was part of a secretive balloon programme to monitor the Soviet Union.

However, in 1950, there was another twist to this public fantasy when the skeptics grew more numerous, when the Air Force conducted a series of secret “dummy drops” over air bases, test ranges and unoccupied fields across New Mexico. These experiments, meant to test ways for pilots to survive falls from high altitudes, sent bandaged, featureless dummies with latex “skin” and aluminum “bones”–dummies that looked an awful lot like space aliens were supposed to–falling from the sky onto the ground, whereupon military vehicles would descend on the landing site to retrieve the “bodies” as quickly as possible.  So we can see how much folklore is associated with the UFO mystery

Subsequently the testing base for advanced aircraft, known as Area 51 in Nevada, became the alleged centre for UFO research. For the conspiracy theorists this was where the US government sought to harness advanced alien technology.

Over the years many of the most outlandish theories have been debunked. But in 2017, the Pentagon did finally admit that it had a long-standing programme, now terminated, investigating alleged UFOs.

Undoubtedly the Idea of Aliens do fascinate people because of mystery attached to it. The event at Roswell got so embedded in public mind that it has inspired novels like Roswell High by Melinda Metz or even a recent television series Roswell, New Mexico , which is an American science fiction drama, named after the city . 

The inevitable question that follows is, are we a freak occurrence of life in the Universe, are we alone in this cosmos of Trillions of stars, galaxies, planets, exoplanets and what have you or is there life elsewhere too

DOI: 10.6084/m9.figshare.12571016
https://doi.org/10.6084/m9.figshare.12571016

More about this in subsequent articles

Part II will examine whether Science Fiction is really Fiction?

Part III will deal with the quintessential question: Are we alone in the Universe?

Also Read:

• The UFO sighting investigated by the police
• UFO ‘sighting’ becomes legend like King Arthur

This OneVorld video gives us insights into Professor Yogesh Kulkarni’s Domestic Compositor from the University of Pune exhibited at DCE.

The compositor uses the culture developed by BARC (Baba Research Atomic Centre). The moisture needs to be removed from the mixture so the system is designed in such a way that the moisture is not retained and decomposes the green matter. The baffles are designed to provide proper aeration to the mixture of waste and culture.

It can be installed under the basin and can decompose 1.5 kilograms of organic matter every day. After putting the culture inside, it needs to be rotated twice a day. Normally in a week’s time, the entire waste is decomposed.

Rainwater is amongst the purest water one can get distilled as it is by the sun. However, in a rainwater harvesting system, the water comes in contact with several surfaces, such as the roof or gutters. Its flow becomes possibly mixed with leaves or dust.

To get water fit for use at the end of the harvesting process, apart from keeping these surfaces clean, we can filter the water before storage. Ideally a water harvesting filter with inbuilt Sand and Aggregate filter is long lasting and requires less maintenance. See the link below for the design of such a pit.

However when there is a space crunch you can use a modular pipe filter to be directly connected to the piping system from the roof to the borewell or dugwell to be recharged. For maintenance of that system you must refer to the manufacturer’s brochure.

Link to the Water Harvesting Filter Pit details:

Domestic Water Harvesting Ideas by Prof. Manohar Khushalani

Recharge Pit with Desilting Weir- Design Manohar Khushalani

This Recharge pit can be used where the volume of water is large and there is not enough space to accommodate a desilting tank. The other advantage is that the surface water runoff can come from all four sides of the pit as the desilting weir can be all around the pit.

Important: The number of borewells depends on the volume of water. Minimum one , maximum two, Three borewells can be used only in exceptional circumstances. Under no circumstance, the borewell should be deeper than the firsr acquifer. This is to ensure that people dont use it for pumping out water from deep acquifers.

High Capacity Recharge Pit Designed By Manohar Khushalani

This Ground Water Recharge Pit is for Societies with many flats or in institutional areas. Size is Indicative depending on the size of the catchment. More than one Pit can be used if necessary. Water to such a pit should be cleaned through one or more Desilting Tanks. See the previous article on Desilting tank

Important: The number of borewells depends on the volume of water. Minimum one, maximum two, Three borewells can be used only in exceptional circumstances. Under no circumstance, the borewell should be deeper than the first aquifer. This is to ensure that people dont use it for pumping out water from deep aquifers.

If there is only direct surface runoff to the harvesting pit from surrounding areas see the next article on built-in desilting weir

Water Harvesting: Recharge Pit with built in Desilting Weir | Manohar Khushalani

For Pipe Filters (Not Recommended in large Catchments) See the link below

Water Harvesting: Pipe Filters where there is a space crunch | Manohar Khushalani

Desilting Tank Design by Manohar Khushalani

After the harvested water is brought down from the catchment area this tank is used to remove the silt from the water.  Dimensions are indicative. The size will vary depending on the amount of water coming in through the inlet pipe. more than one tank can be used in series if the first tank does not remove all the impurities. The Desilting tank should be cleaned in the dry season every year. Water outlet from the last desilting tank in the series will be sent to the Recharge Pit

For details of Recharge Pit with inbuilt filter :

Water Harvesting: High Capacity Recharge Pit | Manohar Khushalani

SOURCES AND CLASSIFICATION OF WATER POLLUTANTS

Dr(Smt) Shanti Vaidya

Senior Research Officer, Chemistry Division,

CW&PRS, Khadakwasla R.S. PUNE, India 411024

WATER is essential for our existence. GOOD and ADEQUATE water is essential for the comfortable and happy living.

The national building code (NBC) as well as the Indian Standards (IS-1172)  assume the requirement of water per person per day to be 135 ltrs. (about 9 buckets) for hygienic living.  The NBC reckons a family to be made up of 5 members on an average. Of this total requirement of 135 ltrs., the quantum needed for cooking and drinking purposes is only about 10 – 15 ltrs.; a substantial portion (about 40 – 45 ltrs.)  goes for flushing the water closets. The rest goes for bathing (30 ltrs.), washing of clothes (15 – 20ltrs), vessels (10 – 15ltrs.), floors (5 ltrs), etc. The portion needed for cooking and drinking at least has to be absolutely free of any pollution.

Of the four Metropolitan cities, viz., New Delhi, Bombay, Calcutta and Madras, only the capital city is able to supply the requisite per captia quantity of treated water. Bombay falls a little short, whereas in Calcutta and Madras, the supply is woefully inadequate, with the Madras Metropolitan Water Supply & Sewerage Board (MMWSSB) itself admitting to a supply of only 78ltrs. per captia which is the smallest quantity supplied in any metropolitan town or city in India.

What is water pollution ?

To pollute is to “make unfit for or harmful to living things, especially by the addition of waste matter”.

1. a) Any Physical or Chemical change in water that can adversely affect humans and organisms.
2. b) Any departure from purity. Better expressed, any  departure from normalcy.
3. c) The addition to water of an excess of material or heat that is harmful to humans, animals, desirable aquatic life or otherwise causes significant  departure   from   normal activities  of various living communities in or near a  water body.

Ever-increasing population and the consequent urbanization and industrialization have mounted serious environmental pressures on these ecosystems and have affected them to such an extent that their benefits have declined significantly. This is particularly grave for water resources. e.g in Bangalore city, studies revealed a nearly 35% decrease in the number of bodies of water during 1973 to 1996. Thus, water the most precious natural resource is the most  USED  and ABUSED resource.

For a suitable restoration action plan, recycling, reuse, recharge are the key words. The knowledge about the characterization of the type and source of pollutants entering the ecosystem can help us device a good restoration plan.  Investigation of the physico-chemical and biological parameters in this regard helps in assessing the status, which is required for evolving appropriate restoration methods towards conservation and management.

Water pollution : How ?  From where i.e. Sources:

Many natural processes like sedimentation, growth of pathogenic organisms, leaching cause water pollution. An  excess of natural processes like tsunami left near-coast lands saline. But the most effective and continuous phenomenon are human activities that cause pollution of all types of waterbodies like  rivers,  lakes,  marshes,  ground  water  and  coastal waters. Pollution then becomes an issue of intensity, the quantity and quality of the pollutant being more important than whether it was generated by natural processes or industrial processes.  Discharging various  wastes in and near a waterbody  causes  pollution of  that waterbody. Wastes   from   following operations cause pollution.

• Domestic waste
• Sewage
• Mining
• Agriculture : This sector uses 70% of total water use in India.
• Stock Breeding
• Fisheries
• Forestry
• Urban human activities
• Construction works
• Industries : This sector uses 8% to 50% of total water use.

Which water is pure water ?

Varied beneficial uses of water require different levels  of  minimum  purity.  Water is suitable for  certain  designated use  if it complies certain crieteria.  Classes A to E are defined by Central Pollution Control Board (CPCB) in 1991.

Tolerance Limits For Inland Surface Water

Class A : For Domestic  Supply  After   Disinfection

Class  B : For Outdoor  Bathing

Class  C : For Domestic Supply After Conventional Treatment  And Disinfection

Class D : For Wild Life And Fisheries

Class  E : For Irrigation, Industrial Cooling,  Controlled  Waste  Disposal

Water Quality Parameters

Which substances can be called pollutant ?

As  per definitions above, any excess of material or heat,  thus  following are some such pollutants:

• Gases CO₂, O₂, N₂
• Dust suspension
• Metals
• Bacteria
• Heat
• Organic substances
• Inorganic substances

A report of CPCB study conducted in 1984 concluded that 75%  pollution  of  rivers is caused  by  discharge  of  UNTREATED  MUNICIPAL  WASTE/SEWAGE  from  large  and  medium towns.  Remaining 25% is due to discharge of partly treated  or untreated EFFLUENTS from INDUSTRY. This certainly is not very encouraging.

Classification of water pollutants

1) Depending on nature of polluting activity:

1. a) Natural surface water run off.
2. b) Dissolved chemical that percolates through soil, causes ground water pollution –
3. c) Human sources like agriculture,  mining,  construction, industry, homes and business – all cause water pollution –

2) Depending upon the pattern of entry :

1. a) Point source which is identifiable and hence comparatively easy to control. e.g. Sewage, storm-water, Industrial effluent, animal feed-lots.
2. b) Non-point source which is widely spread out, diffused and hence difficult to identify and to control. e.g. agricultural run-off, Sediment run offs from natural or human caused forest fire, construction, logging, drainage of acids, minerals, sediments from   active/abandoned mines, oil-spills or spills of other hazardous material.

3) Depending upon the degradability or reactivity:

1. a) Biodegradable: Degraded by microbes in reasonable time say up to 1 month. These pollutants become a problem when added to the environment faster than they can decompose.

Biodegradable pollutants are of two types, rapidly degradable and slowly degradable. Rapidly degradable pollutants are ‘natural’, we put them somewhere until they degrade to non-toxic levels. Slowly degradable pollutants are materials that either do not decompose or decompose slowly in the natural environment. Once contamination occurs, it is difficult or impossible to remove these pollutants from the environment. E.g. synthetic compounds which resemble nothing natural, such as dichloro diphenyl trichloro ethane (DDT), dioxins, polychlorinated biphenyls (PCBs), and radioactive materials. They can reach dangerous levels of accumulation as they are passed, up the food chain into the bodies of progressively larger animals, e.g., molecules of toxic compounds may collect on the surface of aquatic plants without doing much damage to the plants. A small fish that grazes on these plants accumulates a high concentration of the toxin. Larger fish or other carnivores that eat the small fish will accumulate even greater, and possibly life-threatening, concentrations of the compound. This process is known as bioaccumulation. Such very slowly degradable pollutants are more problematic; we try to put them some place forever, because they will not degrade to non-toxic levels in a reasonable period of time.  Ultimately they seep back into the environment and create much havoc. Some special measures like advance oxidation systems are required to remove slowly degradable pollutants from wastewater. They are often difficult and expensive.

1. b) Non degradable pollutants are bacteria, virus, salts of metals, sediment fractions, heavy metals and the last PLASTICS. They are conservative like heat, a form of energy but certainly a pollutant.

4) Depending upon the effect intensity:

1. a) Acute : Such pollutants have an immediate and intense effect on the consumer.
2. b) Chronic or Long term : Such pollutants have slow but long term effects on consumers.

5) To Systematise more, the water pollutants are classified into nine categories:

1. Oxygen-demanding wastes
2. Disease causing agents
3. Plant nutrients
4. Synthetic organic compounds.
5. Oil
6. Inorganic chemicals and mineral substances
7. Sediments
8. Radioactive material
9. Heat (Thermal pollution)

1. Oxygen-demanding wastes: They are degradable by bacterial activity or strong acids/chemicals. Hence, cause depletion of dissolved oxygen. Most of them,  primarily   organic materials  hence,  get oxidized to CO₂ & H₂O. If degraded in anaerobic condition, give out foul odour and decrease  the usable  & recreational value of waterbodies. This process may cause fish kills & danger to other aquatic life, also affect colour, odour, taste of water.

Typically such pollutants come from sewage (domestic and animal), and industrial wastes.  The amount of such substances is estimated in water by quantity called Biochemical Oxygen Demand (BOD).

2. Disease causing agents: 75% – 80% infant deaths are caused by water borne diseases. Water has been a potential carrier of pathogens hence, causing epidemics of typhoid, para-typhoid, dysentery, cholera. Water also transmits diseases like polio and hepatitis. Modern disinfection and treatment plants have greatly reduced this danger in cities. Sewage and such discharge make the waterbody infected with such pathogens and that acts as source of this category of pollutants.

3. Plant Nutrients: For plant growth, nutrients are limiting factor. N  & P enter freshwater and lead to plant growth. When in excess, they cause eutrophication. They tend to accumulate in ground water. Excess concentration also renders water unsuitable for certain uses as they cause high BOD and disagreeable odours. Nutrient enrichment is a natural process (e.g. peat and muck soils or coal and oil deposits). Human activities hasten this leading to aging of lakes in shorter time.

N-P-K fertilizers applied in agriculture get into run off. Run off coefficient is a function of solubility of fertilizer, rate of absorption by plant, rate of decomposition. In the process excess nutrients flow to water and cause eutrophication.

4. Organic chemicals: Detergents (surfactant), pesticides, various industrial products, decomposition products. Some of them are toxic to fish at very low concentration, such as 1 ppm (phenol). Many are not biodegradable or very slowly degradable. Agrochemicals are some special chemicals which may be toxic to biota, human, extremely stable like DDT or have tendency to accumulate in animal and human body.

5. Oil : Production, distribution and use of huge quantities, result is contamination of water with oils. Some are accidental and some operational.

6. Inorganic chemical and mineral substances: Mineral acids, inorganic salts, metal compounds, which come through, smelting, metallurgical, chemical industries, mine drainage etc.. They may injure or kill fish and other aquatic life, may concentrate in food chain, e.g. Mercury. Inorganic mercury may be converted to methyl mercury CH₃Hg⁺ by certain anaerobic bacteria. This causes mercury poisoning.

Water draining to pyrite containing coal mines cause formation of acid (H₂SO₄).  This affects long stretches of streams, turns them acidic cause fish kills, corrosion of plumbing systems, boats, piers, related  structures  and  agricultural crop damage.

7. Sediments: There are soil and mineral particles, washed from land to waters, from croplands, unprotected forest soils, overgrazed pastures, strip mines roads and bulldozed urban areas. Sediments are able to:

• fill stream, channels and reservoirs.
• erode power turbines and pumping equipment
• cause turbidity hence perturb sunlight
• plug water filters
• blanket fish nests, spawn, food supplies to fish and shell fish.

Natural process of erosion causes sediments and its extent is a function of type of soil, geology, topography, precipitation and vegetation cover.

8. Radioactive materials: Wastes of Uranium and Thorium²³⁰ and Radium²²⁶ mining, refining from nuclear power plants, industrial, medical and scientific utlisation of radioactive material  cause  the   pollution. The  effects are lethal or mutagenic. Nuclear weapon tests also cause radio isotopes to come to air & soil and then in water.

The dust and debris of radioactive materials do not settle quickly after explosion hence, can contaminate air for long time. Hence, there is a proposal of Comprehensive Test Ban Treaty (CTBT). Accidental explosion of Chernobyl nuclear power plant caused such pollution.

Strontium⁹⁰ (Sr) (half life 28 years) is chemically similar to calcium. Hence, absorbed by plants and  passed  to  animals,  deposited  in  bones.  This may cause anemia or serious disorders. Cesium¹³⁷ (CS) is chemically similar to K. Hence, its contamination with leafy vegetable, grains cause disorders.

Type of pollutants caused by nuclear power generating plants:

1. Low level radioactive liquid wastes.
2. Heat.
3. Liquids and gaseous wastes from fuel.
4. Fission products within 1-3 years.
5. Heat :

Cooling water from power plants is released in river which  cause  risk  to fish life and other biota. This leads to starvation of newly spawned population, decreased density and viscosity of water, increase settling rate of suspended sediments, evaporation hence higher salinity and less DO. Today  70%  water  used in industries  is  used  as  cooling medium.

An additional threat  to aquatic life is  created  by  the common practice of chlorinating coolant water prior to use.  This is done to prevent bacterial growth that clog pipes.

What can we as individuals do?

1. a) We, as consumers, need to realise the value of water in the city and put in our whole hearted efforts to conserve and utilise available water very carefully.
2. b) We also need to avoid as much as possible the paving of the open areas around our flats to help percolation of rain water into the ground and replenishment of the water table.