Environmental Protection Agency expected to announce new measures to cut methane emissions 45 per cent by 2025
President gives clearest indication yet that he is deeply sceptical about case for controversial tar sands pipeline
Controversial bill supporting project will be debated in the Senate after winning House approval, but President is expected to veto it
Department of Energy report forecasts $5bn return from Federal programme Republicans tried to end after collapse of Solyndra
A Republican-controlled Congress spells bad news for the green economy and UN climate change talks, but will it prove as disastrous as some environmentalists fear
As President announces new $1bn to improve climate resilience, he likens those who reject climate science to people who believe the moon is "made of cheese"