Transport minister Justine Greening says no announcement on £34bn high-speed rail project will be made until January

Draft document floats proposal for shipping carbon levy to help finance Green Climate Fund

Biofuels could meet half the world's jet fuel needs, entrepreneur says at launch of new industry sustainability rankings

Research argues raising premium on energy bills from £2 to £6.50 a year would create solar industry independent of subsidy

Stakes raised at Durban as Brazil admits there is no future for UN's carbon trading system without new agreement

Clean electricity, eco-driving and better scheduling could offset emissions from high-speed rail, report suggests

Government confirms 25 per cent drop in carbon emissions and outlines how meeting 2050 targets could be cheaper than taking no action

Measures to drive investment, boost manufacturing, and £200m support for Green Deal announced, although green groups left unimpressed

Oxfam, WWF and the International Chamber of Shipping call on COP 17 to put sector on path to agreeing market-based mechanism for tackling emissions

Prospect of Big Six falling short of £200bn investment needed for new energy infrastructure prompts call for pension and sovereign wealth funds to get involved