A report out today says the government's Emissions Trading Scheme (ETS) could cost twice as much as originally estimated.

A parliamentary committee's report on ETS was unable to find common ground among the political parties.

A prominent British science writer has slammed New Zealand's clean, green reputation, calling it a "green mirage".

Taxpayers will be stuck with 84 per cent of NZ's Kyoto Protocol bill, while farmers and industrial emitters get hefty subsidies, a study says.

New Zealand's largest exporter, Fonterra, says it will receive no protection under planned changes to the emissions trading scheme.

Air NZ chief executive Rob Fyfe has lashed out at dithering over cutting emissions, described climate talks as a 'bureaucratic circus'.