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
Logistics company set to offset emissions from delivery of more than 200 million packages through BP Target Neutral scheme
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
Stockholm Environment Institute report calls for marine carbon offsets and UN Oceans Commissioner to address the issue
Open letter from 26 leading economists says President should drop US opposition to emissions trading
Joint letters to David Cameron and other European leaders warn scheme poses "intolerable" threat of retaliatory measures