A crowd observes the world’s first Earth Day on April 23, 1970, in Fairmount Park in Philadelphia.
When the current crisis passes, we must seize the opportunity to re-imagine, and to create, a different kind of future.
Temperatures are warming faster in the Arctic than anywhere else in the world. Water and sewer pipes in Iqaluit, Nunavut, are cracking during the winter as the ground shifts.
THE CANADIAN PRESS/Sean Kilpatrick
New research finds that chlorofluorocarbons (CFCs) and other ozone-depleting substances have boosted the effects of climate change in the Arctic.
Sustainable farming can reduce nitrous oxide emissions.
Measurements and modelling have found nitrous oxide emissions, a greenhouse gas 265 times more potent than carbon dioxide, are significantly higher than previously reported.
Sunset at Australia’s Cape Grim observatory, one of the key global background monitoring sites for CFC-11.
For several years, emissions of CFCs have been rising, in apparent defiance of a global ban in place since 2010. A new global detective effort has traced the source to two eastern Chinese provinces.
Researchers release a balloon carrying instruments to measure ozone levels above Antarctica.
Almost 30 years ago the world responded to the realisation that our ozone layer was in trouble. The resulting Montreal Protocol was a rare example of global cooperation, but there's no room for complacency.