Canada

Representatives approve bill declaring that controversial oil pipeline from Canada does not need president's permission

World Trade Organisation rules against Ontario's tilting of feed-in tariff in favour of local manufacturers

Letter argues State Department used outdated modelling to suggest pipeline will not lead to increased greenhouse gas emissions

Jerry Brown says two markets could link up from January next year

Credit agency teams up with Carbon Tracker Initiative to analyse long-term creditworthiness of firms investing in Canadian oil sands

Secretary of state's meeting with Canadian foreign minister will almost certainly touch on the controversial pipeline project

Supporters hope state-wide cap-and-trade scheme could provide a model for the rest of the country

Opposing campaigners call on president to end uncertainty over controversial pipeline linking US to Canadian tar sands

Scientists to march through Ottawa in white lab coats in protest at cuts to research and environmental damage

Draft proposals for state's emissions trading scheme raise possibility of cross-border sharing of allowances and credits