Global warming is happening faster than expected and at worst could raise sea levels by up to 2m by 2100, a group of scientists said on Tuesday.
Prospects for a new UN climate pact have brightened but negotiations must speed up to meet a December deadline, a UN official said on Tuesday.
A big expansion of Antarctica's ice almost a million years ago may help scientists predict modern climate change, a study has shown.
Birds falling out of the sky in the US and Sweden are freak examples of the kind of mass animal deaths that have unusual but not apocalyptic causes.
Scientists are struggling to explain a slowdown in climate change that defies a rise in global greenhouse gas emissions.
UN climate talks have made progress at the halfway mark but many of the toughest issues are deadlocked, delegates said on Saturday.
Fifty-five countries have formally pledged to cut or limit their emissions in a move welcomed by the UN's climate-change body.
The UN has defended its panel of climate scientists from criticisms that an error about the thaw of Himalayan glaciers undermined its wider findings.
Illegal logging has fallen by 22% worldwide in the past decade but remains a huge problem from Brazil to Indonesia, a study showed on Thursday.
Investments to create jobs in clean energies risk backfiring by curbing employment in other parts of the economy, a study has shown.