Environmental Science

Order of the National Green Tribunal regarding deterioration of Nayar river, Uttarakhand, 05/06/2025

Order of the National Green Tribunal in the matter of In Re: News Item titled "Nayar river is vanishing - a yatra reveals conservation goes beyond science and policy" appearing in ‘The Down To Earth’ dated 03.06.2025. The original application was registered suo-motu based on the news item titled "Nayar …

Study recommdends silver ionisation to purify water

The method to purify water, known as silver ionisation, is a safe consumer-friendly and reliable method as compared to conventional methods, such as chlorination, employed to disinfect drinking water. This is the recommendation of Industrial Toxicology Research Centre, Council of Scientific and Industrial Research, Government of India, Lucknow.

Heavy duty battery

need to sponge out heavy metals from industrial wastewater? Try seaweeds. Two researchers at the Kochi-based Central Marine Fisheries Research Institute has found that certain sea plants found along the Gulf of Mannar coast may not only help remove heavy metals such as cadmium and lead but also allow their …

Deep distress

global carbon dioxide emissions from burning fossil fuels are altering ocean chemistry and threatening marine organisms, including coral reefs, claims a us report released recently. Based on the data and experimental finding from various studies, the report says that oceans absorbed about 118 billion tonnes of carbon between 1800 and …

Separately purified urine is environment friendly

collecting and purifying urine separately is more environment friendly and cost-effective than simply allowing it to flow into the sewer, claims a Dutch study. Conducted by Jan Wilsenach of the Delft University (du) in the Netherlands, the study says the measure would save electricity and chemicals used at sewage treatment …

Errors of emission

Mobile source air toxics come from four sources. One: some toxics are present in fuel and are emitted into the air when the fuel evaporates or passes through the engine unburned. Benzene, for example, is a component of gasoline. Cars emit small quantities of benzene in unburned fuel, or as …

The silent earthquakes

A three-year joint project by the University of Tokyo and Stanford University has found a way of accurately mapping the epicentres of minuscule pre-quakes, researcher Sho Nakamula, of University of Tokyo, said on Wednesday. The results, published earlier this month in the journal Nature, could lead to improved earthquake prediction …

Microbes midas touch turns dust into gold

Researchers in Australia have uncovered evidence that a tiny microbe may have the midas touch of Greek legend, capable of turning dust to gold. Findings reported in the 14 July issue of the US based magazine Science suggest a bacteria known as Ralstonia metallidurans may play a key role in …

New light on ion interaction may improve water quality

Scientists at the U.S. Department of Energy's Argonne National Laboratory have discovered new ways that ions interact with mineral surfaces in water, opening a door to new knowledge on how contaminants travel in the environment. The insight, published in Physical Review Letters, leads to a better understanding of the factors …

Trees could grow in Antarctica..

Trees could be growing in the Antarctic within a century because of global warming, an international scientific conference heard. With carbon dioxide levels in the atmosphere set to double in the next 100 years, the icy continent could revert to how it looked about 40 million years ago, said Prof. …

Climate change could slash US wine industry - study

Global warming could slash productivity in prime US wine-making areas like California's Napa and Sonoma valleys by century's end, leaving some of the best temperatures for grape-growing in New England, researchers reported. "We're projecting dramatic decreases in total production in the continental United States and this is really due to …

DuPont plans to make Corn-Based Plastic

DuPont Co, the third-largest U.S. chemical maker, plans to make corn-based plastics for automobiles and electronics starting next year to expand products produced from renewable resources. DuPont's Sorona thermoplastic and Hytrel thermoplastic elastomer will be available starting in mid-2007, Cathy Branciaroli, spokeswoman for Wilmington, Delaware-based DuPont, said. Uses include electronic …

Ozone hole over Tibet

a large hole may be developing in the ozone layer over the Qinghai-Tibet Plateau, says a Chinese study. The area of depleted ozone appears to be spread over 2.5 million-sq km, which is almost three-fourth the size of India, says the study published in a recent issue of the Chinese …

Hot air

Biogas, an ecofriendly alternative to fossil fuels, has been criticised for releasing methane, a greenhouse gas that is 20-25 times worse than carbon dioxide in causing global warming. It was believed that if methane emissions exceed 5 per cent of biogas produced, then the use of fossil fuels would be …

Is aluminium safe?

can aluminium, commonly used to make utensils, be a health hazard? The long-standing question was revived recently with researchers suggesting a possible role of the versatile metal in the death of a British woman. Carole Cross of Camelford village in Cornwall died of Alzheimer's disease 16 years after an industrial …

Nitrogen threatens biodiversity

increasing atmospheric concentration of nitrogen threatens plant species in sensitive ecosystems in the developing world, claims a recent study. The Western Ghats and Sri Lanka are likely to be the worst affected. Researchers studied the nitrogen concentration over 34 biodiversity hot spots, which account for almost 50 per cent of …

Restore wetlands

restoring lost and degraded wetlands could reduce the threat of bird flu pandemics, claims a study commissioned by the United Nations Environment Programme (unep). The study Avian Influenza and the Environment: An Ecohealth Perspective found that the loss of natural wetlands compels wild species to join domestic species in farm …

Gender bender

oxygen depletion in oceans, caused mainly by agricultural run-off and pollution, creates dead zones where sea creatures can suffocate. A recent study claims that dead zones can also lead to male-dominated fish population, which can drive a species to extinction. Researchers from the City University of Hong Kong raised zebra …

Pesticides lower intelligence

Exposure to pesticides lowers the intelligence quotient (IQ) of children, claims a US study. Conducted by researchers from the University of North Dakota (UND) in the US, the study examined two groups of 64 children each, aged 7-12 years. One group comprised of children living on or near farms and …

Farming is cool

several modern agricultural practices such as increased irrigation coverage and no-till farming may reduce the effect of global warming, claims a recent study. But climate change models have failed to take into account these positive aspects of agriculture, say climate scientists from the Lawrence Livermore National Laboratory (llnl) in the …

Losing cover

around the world, soil is being lost through erosion 10-40 times faster than it is replenished, destroying 10 million hectares (ha)

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