As a "mutated fish" is reportedly found at a site downstream of one of Canada's controversial oil sands development, leading green groups walk away from project approval initiative
Department of Energy ploughs $15.3m in fresh funding into 10 projects aiming to extend range of fuel cell vehicles
Scientists call for tighter regulation on nitrogen emissions from cars, power plants and fertilisers
Generating energy from the ocean's waves is a top priority for the mayor
US research team reckons heat capture technology could cut car fuel bills by 10 per cent
Changes designed to stop Endangered Species Act being used to tackle climate change
US lobby group claims its time to junk the junk mail
State angered over Environmental Protection Agency's rejection of request for scaling back of US biofuel targets to address soaring corn prices
Mayor launches new construction standards designed to cut carbon emissions by 60,000 tonnes a year by 2012
Gaps emerging between McCain and Obama's plans for tackling global warming and energy security