Legislation

Proposed levies could generate $12.4bn in annual tax revenues

Green groups launch legal challenge against Treasury's decision to wave through RBS investment in fossil fuel industries

Lisa Murkowski is the second Republican Senator inside a week to break ranks and signal that she could vote for US climate change bill

Prime minister will tell the Major Economies Forum that world leaders have an historic opportunity to reach an international deal this year

Government has drawn up secret plans to tax electricity consumers to subsidise new nuclear reactors, the Guardian has learned

Lisa Ashford of EcoSecurities argues that, while some new carbon regulations fail to recognise carbon offsets, that should not discourage firms from undertaking offset programmes

Conservative leader insists small government can deliver deep carbon cuts

Fresh commitments may breathe life back into Copenhagen deal as India prepares to announce cap and trade scheme

PFI initiative will be funded to the tune of £40m by the Welsh Assembly over the next 25 years

Current proposals discourage smaller scale generation