Did a supernova trigger the late Devonian extinction?
Earth suffered an intense loss of species diversity that lasted for at least 300,000 years, possibly caused by long-lasting ozone depletion, …
How dust storms are adding to pollution woes of north India
Such storms lead to increase in surface ozone, particulate matter as well as harmful greenhouse gases
Chloroform emissions may slow down Ozone layer recovery
MIT study traces rise in emissions to eastern China, where it appears that production using chloroform is on the rise
In Delhi, deadly air pollution is never out of season
After a deadly smog episode in winter, the city witnessed severe ozone pollution this summer, followed by a spike in PM10 level due to pre-…
Living with the Devil's Element
BBC's film on chlorine is more successful in underlining the vital role it plays in daily life, rather than in detailing why it should be banned
A long-term perspective on global warming
Global Warming: The Economic Stakes William R Cline Publisher: Institute for International Economics, Washington, May 1992 Pages: (xi) + 103 …
Unhappy compromise over atmosphere
Though the bracketed chapter on atmosphere was resolved in Rio, OPEC nations continue to feel dissatisfied
Ozone: good news and bad news
Hole in the ozone layer is healing, but ground level ozone is destroying crops that could feed a third of India’s poor
MOP: Challenges galore, but solutions few
On the second day of the meeting, developing countries raise concerns over the phasing out of HFCs; developed countries show little concern
Anxiety helps hasten ozone safety deadlines
Despite Third World pleas for generous grace periods, Montreal Protocol nations have moved forward the phase-out dates for chemicals threatening …
Lurking threat
Nascent, nasty and lethal, ozone has risen to dangerous levels in Delhi, and is increasing in various cities -- damaging human health and …
Global warming worryingly close to lower limit set by Paris Agreement: WMO
The risk of losing the race against climate change becomes real as temperature rise globally likely to breach 1.2 degrees by the end of 2016
How a saviour of the ozone hole became a climate change villain – and how we're going to fix it
HFCs were created to replace ozone-damaging chemicals, but they turned out to be major contributors to climate change
The hole truth
NASA discovers the largest ever ozone hole over Antarctica. A wake up call for industrialised countries to reduce greenhouse gas emissions
Substance Abuse
The Montreal Protocol was meant to eliminate Ozone-depleting substances. It is turning out to be a technology trap for Indian industry. And …
Hydrogen fuel is hostile to stratospheric ozone
By using hydrogen fuel cells -- the best alternatives to fossil fuels -- we may be heading towards another environmental disaster
Safeguarding Ozone and Earth
As we celebrate the 22nd International Day for the Preservation of the Ozone Layer, Down To Earth takes a look at what should be done to …
NASA satellite that revealed ozone holes completes a decade in space
Aura has been sending data which has been invaluable in improving our understanding of pollutants
Here comes the ozone brigade
Indian manufacturers of CFCs are no longer fatalistic about winding up, but they are banding together to overcome ploys that will gag attempts to …
The US' mixed record in green causes
A globalising world requires multilateralism to attain shared goals -- particularly the preservation of ecological security. While this can …
Climate change-driven wildfires, heatwaves to worsen air quality & levy additional ‘climate penalty’
Surface ozone levels are expected to increase across heavily polluted areas, particularly in Asia
Concentration of air pollutants significantly increasing over India: IPCC
Just effective decarbonisation policies not enough to bring SO2, NO2, O3 and NH3 to safe levels; clean energy and waste management would be needed
Why indoor pollution is as deadly as its outdoor counterpart
With the continual improvement in our quality of life, indoor air quality has become an important area of concern in the 21st century
‘Solid, liquid waste may have overtaken fertilisers as the biggest source of N2O emissions’
Nandula Raghuram, chair of International Nitrogen Initiative, talks to DTE on the rise in nitrous oxide emissions, its repurcussions and …
The ozone threat
Alternatives to banned ozone-depleting substances may jeopardise the effectiveness of the Montreal Protocol