Legislation

Center for Biological Diversity announces lawsuit against EPA over its failure to recognise threat from increasingly acidic oceans

As Sellafield operator admits to embarrassing safety flaws, academics line up to criticise consultation process

IMO study to argue that carbon-cutting measures will save shipping operators money

New bill calls for nationwide policy for enhancing grid transmission efficiency

From speed-limiting technology to arguing green energy firms, we look at the stories that have made it big in the past week

Economic models predict global efforts to improve energy efficiency will be only half as effective as first thought

Emission targets watered down to secure support of wavering Democrats, as backers insist bill could still pass this year

Republicans block Obama's nominee for Interior Department appointment in show of anger at administration's efforts to tighten oil and gas regulations

White House downplays memo suggesting concerns over EPA's endangerment finding

Researchers predict that 100 million early deaths could be prevented by cutting global emissions by 50% by 2050