Ozone

Order of the National Green Tribunal regarding ozone pollution across urban India, 21/03/2025

Order of the National Green Tribunal in the matter of News Item titled “CSE report finds dangerous increase in ozone pollution across urban India” appearing in Down to Earth dated 06.08.2024. The Principal Bench of the NGT heard the matter on March 21, 2025. In the original application, registered suo …

Preserving Montreal Protocol Climate benefits by limiting HFCs

The Montreal Protocol is perhaps the most successful international environmental treaty, responsible for global phaseout of the consumption and production of ozone-depleting substances (ODSs), e.g., chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs). Hydrofluorocarbons (HFCs), which do not destroy stratospheric ozone, were considered long-term substitutes for ODSs and are not controlled by the …

UN report’s carbon clause irks Ramesh

The United Nations Development Programme (UNDP) report on Millennium Development Goals (MDG) on Friday came in for sharp criticism from Union rural development minister Jairam Ramesh for having included carbon emissions and ozone depleting substances as one of the goals. The minister, who released the report, said that the MDG …

Asia-Pacific winning fight against poverty

The Asia-Pacific region has made great strides in reducing poverty and is moving fast towards other development goals, but levels of hunger, and child and maternal mortality are still high, according to a United Nations and Asian Development Bank (ADB) report released here today. The Asia-Pacific region has already reached …

A Second Front in the Climate War

Year after year, the world’s nations gather to find ways to reduce carbon dioxide, the main greenhouse gas, with little meaningful progress. Frustrated by this slow pace, the United States and five other countries announced this week a modest but potentially game-changing initiative to cut three other pollutants that also …

Worsening air pollution costs China dearly: study

China's worsening air pollution, after decades of unbridled economic growth, cost the country $112 billion in 2005 in lost economic productivity, a study by the Massachusetts Institute of Technology (MIT) has found. The figure, which also took into account people's lost leisure time because of illness or death, was $22 …

Are humans alone or are aliens avoiding us?

Civilizations From Oldest Stars Had Enough Time To Reach Earth If They Wanted To: Researchers. Washington: If alien life really exists, they would have found humans by now, but consciously avoiding us for unknown reasons, a new study has suggested. Researchers, who calculated the time a society would take to …

UN Calls Sustainable Development a Top Priority

The UN High-Level Panel Global Sustainability released its report in Addis Ababa yesterday entitled Resilient People, Resilient Planet: A Future Worth Choosing. The panel’s 99-page report, which will serve as an input to the UN Conference on Sustainable Development in June, (otherwise known as the Rio+20 Summit) is a call …

Impact of tropspheric ozone on crop growth and productivity – a review

This review presents tropospheric ozone (O3), an air pollutant affecting agriculture by reducing crop yield and deteriorating quality of produce. O3 enters leaves through stomata and diffuses within the apoplast, producing many oxidizing compounds and affecting various physiological and biochemical processes, crop growth and yield. O3 affects above and below …

Pollutants key to climate fix

Buses spew clouds of black exhaust fumes in Mexico City while, in India, wood burnt in rudimentary stoves fills houses with sooty smoke. Methane leaks from gas pipelines in Russia and rice paddies in China, eventually breaking down in sunlight and contributing to the production of smog and ozone. In …

Simultaneously mitigating near-term climate change and improving human health and food security

Tropospheric ozone and black carbon (BC) contribute to both degraded air quality and global warming. We considered ~400 emission control measures to reduce these pollutants by using current technology and experience. We identified 14 measures targeting methane and BC emissions that reduce projected global mean warming ~0.5°C by 2050. This …

Simultaneously mitigating near-term climate change and improving human health and food security

Tropospheric ozone and black carbon (BC) contribute to both degraded air quality and global warming. We considered ~400 emission control measures to reduce these pollutants by using current technology and experience. We identified 14 measures targeting methane and BC emissions that reduce projected global mean warming ~0.5°C by 2050. This …

Exposure assessment for estimation of the global burden of disease attributable to outdoor air pollution

Ambient air pollution is associated with numerous adverse health impacts. Previous assessments of global attributable disease burden have been limited to urban areas or by coarse spatial resolution of concentration estimates. Recent developments in remote sensing, global chemical-transport models, and improvements in coverage of surface measurements facilitate virtually complete spatially …

The environmental cost of diesel subsidy

Every time petrol prices rise, people start buying diesel-powered vehicles, which add to toxic pollution in our cities Consider this. Every time petrol prices rise, oil companies end up losing more money. How? The price differential between petrol and diesel increases further; people start buying diesel-powered vehicles so oil firms …

Ten years on, city loses CNG edge: experts blame rising number of diesel vehicles, overloading for pollution

New Delhi: After the early 2000s, when Delhi’s air became dramatically clean after the introduction of CNG in public transport, it has once again turned into a deadly cocktail of various pollutants. High levels of particulate matter (PM) that fired the original ‘clean air’ campaign 15 years ago, are no …

Near-term climate protection and clean air benefits: actions for controlling short-lived climate forcers

This report addresses the mitigation of short-lived climate forcers (SLCFs) and its key role in air pollution reduction, climate protection and sustainable development. SLCFs are substances in the atmosphere that contribute to global warming and have relatively short lifetimes in the atmosphere. The focus is on three SLCFs – black …

Integrated assessment of black carbon and tropospheric ozone: summary for decision makers

Scientific evidence and new analyses demonstrate that control of black carbon particles and tropospheric ozone through rapid implementation of proven emission reduction measures would have immediate and multiple benefits for human well-being.

Plan to expand Games air vigil

New Delhi: The system for air quality forecasting and research (SAFAR) that was used to monitor and forecast air quality and weather conditions at various venues during the Commonwealth Games last October is now being installed across the city. The project, that received a letter of excellence as the first …

Rising share of diesel vehicles

The Centre for Science and Environment had recently pointed out that continued heavy subsidisation of diesel had resulted in people shifting to buying of diesel vehicles. The subsidy on diesel had led to a situation where consumption by private vehicles — passenger cars and SUVs — exceeded consumption by the …

Future forests may soak up more CO2 than previously believed

North American forests appear to have a greater capacity to soak up heat-trapping carbon dioxide gas than researchers had previously anticipated. As a result, they could help slow the pace of human-caused climate warming more than most scientists had thought, a University of Michigan ecologist and his colleagues have concluded. …

Greens Sue Obama Administration Over Axed Smog Rule

Public health and environmental groups sued the Obama administration on Tuesday to overturn a decision that scrapped tougher standards on smog pollution which causes lung and heart problems. Earthjustice, the American Lung Association, the Environmental Defense Fund and others sued the administration after the White House on September 2 directed …

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