After a disappointing conference last year in Copenhagen, this was billed the year for the US to get tough about global warming. But a US Senate compromise may be on the rocks, and the nation's breakthrough state law is under challenge in California. Also, a sunken oil rig causes a massive oil leak in the Gulf of Mexico, and for the past 70 years, either Labor or the Conservatives have ruled Britain. This year might see a historic change.
Banner image: California Global Warming Solutions Act of 2006 (AB 32) takes major steps toward cutting greenhouse gas emissions. Photo: David McNew/Getty Images