Alaska sues US government amid fears that granting bears endangered status will harm oil industry
US ski resorts embrace renewable energy, onsite generation and offsets as they seek to tackle climate change threat
Proposed resolution designed to outlaw export of toxic electronic waste to developing world
Despite opposition from some manufacturers, the US looks set to introduce tough new rules forcing toy manufacturers to remove dangerous chemicals from their products
Environmental Protection Agency threatened with fresh legal action over failure to reach a decision on whether or not to regulate carbon emissions
But dip in oil price and concerns over competitor fail to derail $500m IPO
Environmentalists reiterate calls for more stringent carbon regulation after details of government report emerge linking manmade climate change to health risks
New legislation would make 80 per cent of vehicles capable of being run on biofuels, but Texas wants a waiver over concerns about rising corn prices
New report finds emerging markets in Asia, Africa and the Middle East at most risk from climate change impacts
US agreement to help pave way for 2010 launch of all-electric car