Though the world's attention is focussed on the degradation of tropical forests as a major contributor to global warming, the depletion of boreal forests may also be playing a role.

Atmospheric researchers are being criticised for selfishly creating panic by exaggerating the consequences of a depleted ozone layer

Small island countries will test, at a 1994 world conference, the sincerity of Western nations' promise about aiding development, which they made at Rio.

Volcanic explosions don't only throw up a lot of dust and kill thousands of people. Even two years after a flare up, weather patterns in distant places can be affected.

The US envoy to the UN has indicated Washington may tone down its opposition to steps taken to reduce emission of greenhouse gases.

Simulated climate models show increasing carbon dioxide and chlorine emissions can drastically alter weather conditions and lead to the formation of an ozone hole over the Arctic.