New research claims impact of shipping pollution far higher than previously thought, paving way for tighter regulations
State angered over Environmental Protection Agency's rejection of request for scaling back of US biofuel targets to address soaring corn prices
Gaps emerging between McCain and Obama's plans for tackling global warming and energy security
Planned 5,050MW project is latest to set sights on title of world's largest wind farm
Bipartisan group of senators seek to break deadlock over renewable tax credits and offshore drilling
Senate Committee urges Small Business Administration to accelerate plans to introduce new energy efficiency incentives
Environmental Protection Agency threatened with fresh legal action over failure to reach a decision on whether or not to regulate carbon emissions
But rules imposing cleaner fuel on ships on track for 2009 launch
Environmentalists reiterate calls for more stringent carbon regulation after details of government report emerge linking manmade climate change to health risks
Draft plans for joint US-Canadian cap-and-trade scheme released