USA

New figures suggest US imports of cheap Chinese solar panels more than doubled over past six months

Massachusetts study finds wind turbines can be annoying but do not directly cause health problems

Republican leaders insist they are looking at all options as they battle to reverse rejection of tar sands pipeline

Ministry accuses US of jeopardising clean-energy co-operation and undermining global efforts to cut emissions

Commerce Department fires latest shot in simmering clean tech trade war between US and China

Rush for expiring Federal loans helps global investment reach a new high of $260bn in 2011

Western Climate Initiative market expected to overtake established Regional Greenhouse Gas Initiative, doubling volumes traded

Oil giant expands partnership with Sempra Energy to build two giant US wind farms

Romney, Santorum and Gingrich all tout anti-environmental credentials ahead of crucial New Hampshire primary

New online tool to help job seekers tap into booming green jobs market