Talks in Denmark raise prospect of surplus credits being held back from auction in 2013
Brussels to determine whether using tax revenues to reduce CO2 is an "equivalent measure" exempting Chinese airlines from emissions trading
Institutional Investors Group on Climate Change calls on ministers to take urgent action to bolster carbon price
Senior US official says EU’s aviation emissions levy could have negative effect on UN climate negotiations
Environment minister slams 'unacceptable' EU efforts to impose carbon levy on flights
Record volumes of trading fail to compensate for plummeting carbon prices
New EU data confirms emissions fell 2.6 per cent last year, prompting carbon price to fall to record low of just over €6 a tonne
Green groups welcome trade body's decision but condemn call for the Obama administration to continue opposing emissions trading
Exec says Brussels is mistaken to pursue regional approach to cutting emissions, as bosses reiterate commitment to sustainable development
Open letter from 26 leading economists says President should drop US opposition to emissions trading