Climate change

Firms urged to watch 24 Hours of Reality, which premieres in the UK tonight at 7pm

Study calculates emissions reduction in switching to gas, but finds little effect on overall warming trend

Academics attempt to recreate an artificial volcano that would inject particles into the stratosphere to cool the planet

Rising greenhouse emissions could tip off aliens that we are a rapidly expanding threat, warns a report

Energy Information Administration confirms US greenhouse gas emissions rose 3.9 per cent in 2010

World Resources Institute brings together Goldman Sachs, General Electric, Bloomberg, and others to develop water risk map

Government agency reveals cuts in emissions will fail to offset soaring impact of Canadian tar sands

Chinese media reports that comprehensive plan for slashing carbon emissions per unit of GDP is in the pipeline

Energy and Climate Change Secretary completes his trio of recent speeches on climate policy

Security Council acknowledges concern climate change may "aggravate certain existing threats to international peace and security"