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More than half of India’s ground water contaminated: Groundwater Board

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Image source: desertsun.com

Kolhapur/New Delhi: “Overuse of fertilisers has contaminated our ground water”, said Rajendra Nad, 52, who farms millet, sorghum and groundnut, and lives in Jalgaon district’s Bhusaval. Fertiliser overuse is posing a grave threat to India’s freshwater sources.

Five years ago, when Ramakant Desai, 55, hired a drilling rig to sink a borewell to irrigate his maize fields, he struck water at 200 ft. Today, the rig must drill more than four times as deep to 900 ft.

This is a common story in Desai’s village of Gargoti in the southern Maharashtra district of Kolhapur.

In a country where 74 percent of farmland is not irrigated and water shortages are growing – a report by the EA Water consultancy warns India will become “water scarce” by 2025 – depleting groundwater levels add to an ongoing farm crisis. In recognition of groundwater declines, Finance Minister Arun Jaitley said his government would spend Rs 6,000 crore (almost $900 million) on “groundwater management”, but the details are unclear.

India draws more freshwater annually compared to any other country – 761 billion cubic meters per year for domestic, agricultural and industrial use, according to four-year (2011 to 2015) World Bank data. The scarcity has worsened because more than half of that water is now contaminated, mainly by industry and sewage, sparking diarrhoea, typhoid and viral hepatitis.

With larger population, China uses 28 percent less freshwater than India

A common argument is that India’s growing water use in inevitable. But China, with 1.4 billion people, uses 554.1 billion cubic metres of freshwater every year – that’s 28 percent less than India.

The consequence: India’s annual per capita availability of water fell 74 percent over 69 years, from 6,042 cubic metres in 1947 to 1,545 cubic metres in 2011, according to a government water policy report.

“The political economy of subsidies has resulted in unsustainable extraction and use of groundwater and eventually to its depletion,” said Ayan Biswas, a water-management expert. Farmers using cheap, subsidised electricity are encouraged to draw groundwater without restriction, he said.

Water depletion in rural India is a result of unsustainable agriculture practices such as farms in water-scarce regions with water-hungry crops like paddy, cotton and sugarcane.

Groundwater levels “critical” in nine states

In nine states – in south, west and central India – groundwater levels are now described as “critical”, according to a 2016 parliament committee report on water resources. “Critical” implies a stage where 90 percent of groundwater has been extracted, with a significant decline in recharge capability.

As of December 2015, of 6,607 units (blocks, mandals, talukas) assessed, 1,071 in 16 states and two in union territories, were categorised as “over-exploited”, which means 100 percent of groundwater has been drawn, with little chance of recharge.

Groundwater levels in India are now more critical than anywhere else on earth, IndiaSpend previously reported. More than half of India now faces what is called “high” to “extremely high” water stress, most across the fertile Ganga-Brahmaputra basin.

Tamil Nadu and Rajasthan have the most over-exploited blocks.

More than half of India’s groundwater is contaminated

The other aspect of the water crisis is contamination. Surface and groundwater are laced with fluoride, nitrate, arsenic and iron.

As many as 650 cities and towns lie along polluted rivers, which contaminate groundwater, according to the latest report of the Central Pollution Control Board.

“Poor environmental management systems” in industries lead to toxic and organic waste discharges of water, the report said. This has resulted in “pollution of surface and groundwater sources from which water is drawn for irrigation and domestic use”.

More than half of India’s groundwater is contaminated, according to the Central Groundwater Board report. As many as 276 districts have high levels of fluoride, 387 districts report nitrates above safe levels and 86 districts have high levels of arsenic, the report said.

On average, contaminated water caused 10 million cases of diarrhoea, 740,000 cases of typhoid and 150,000 viral hepatitis cases between 2007 and 2011, the groundwater board said.

Back in Jalgaon, Nad’s village is falling back on traditional methods to fight the crisis. “We are looking at reviving the watercourse, to water pooling,” he said. “Hopefully, these will provide water for drinking and crops during dry spells.” (Sandeep Pai, IANS)

  • gauri

    its a reality check and something needs to be done about it to lessen the plight of farmers and common people

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Plastics Can Be Eaten By Enzymes And Reduce Pollution

The enzyme is able to digest polyethylene terephthalate

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Packs of flattened polyethylene terephthalate (or PET) bottles are carried into a depot before being pulverized as part of a recycling process at Tokyo PET Bottle Recycle Co. in Tokyo, Aug. 13, 2002. Researchers in Britain and the United States have engineered an enzyme that breaks down such plastics.
Packs of flattened polyethylene terephthalate (or PET) bottles are carried into a depot before being pulverized as part of a recycling process at Tokyo PET Bottle Recycle Co. in Tokyo, Aug. 13, 2002. Researchers in Britain and the United States have engineered an enzyme that breaks down such plastics. VOA

Scientists in Britain and the United States say they have engineered a plastic-eating enzyme that could help in the fight against pollution.

The enzyme is able to digest polyethylene terephthalate, or PET — a form of plastic patented in the 1940s and now used in millions of tons of plastic bottles. PET plastics can persist for hundreds of years in the environment and currently pollute large areas of land and sea worldwide.

Researchers from Britain’s University of Portsmouth and the U.S. Department of Energy’s National Renewable Energy Laboratory made the discovery while examining the structure of a natural enzyme thought to have evolved in a waste-recycling center in Japan.

Finding that this enzyme was helping a bacteria to break down, or digest, PET plastic, the researchers decided to “tweak” its structure by adding some amino acids, said John McGeehan, a professor at Portsmouth who co-led the work.

This led to a serendipitous change in the enzyme’s actions — allowing its plastic-eating abilities to work faster.

“We’ve made an improved version of the enzyme better than the natural one already,” McGeehan told Reuters in an interview.

“That’s really exciting because that means that there’s potential to optimize the enzyme even further.”

The team, whose finding was published Monday in the Proceedings of the National Academy of Sciences journal, is now working on improving the enzyme further to see if it could be capable of breaking down PET plastics on an industrial scale.

Plastic pollution
Plastic pollution, Pixabay

“It’s well within the possibility that in the coming years we will see an industrially viable process to turn PET, and potentially other [plastics], back into their original building blocks so that they can be sustainably recycled,” McGeehan said.

‘Strong potential’

Independent scientists not directly involved with the research said it was exciting, but cautioned that the enzyme’s development as a potential solution for pollution was still at an early stage.

“Enzymes are non-toxic, biodegradable and can be produced in large amounts by microorganisms,” said Oliver Jones, a Melbourne University chemistry expert. “There is strong potential to use enzyme technology to help with society’s growing waste problem by breaking down some of the most commonly used plastics.”

Douglas Kell, a professor of bioanalytical science at Manchester University, said further rounds of work “should be expected to improve the enzyme yet further.”

Also read: Ayushmann Khurana speaks against plastic pollution

“All told, this advance brings the goal of sustainably recyclable polymers significantly closer,” he added. (VOA)