From a new energy secretary to keeping the news coming when the lights go out, we run down the key lessons of the week

Employment minister Ed Davey widely tipped to take over from Huhne, whose resignation is an 'unwelcome distraction for green business'

Carbon Trust-backed company eyes expansion after significant investment from Townsend Group

Greg Barker outlines plans to increase subsidies for the technology and explore other policy levers to improve take-up

Latest move likely to heighten transatlantic tensions over charges for emitting CO2

UK could follow German model of reducing subsidies when installations reach a certain volume

Consultation on building standards includes proposals to force property owners to fit energy efficient measures during renovations

Government body orders all domestic airlines and large airports to monitor CO2 output ahead of possible national registry

Recession-related fall in emissions makes moving beyond 20 per cent by 2020 target feasible and affordable, report finds

New report backed by Dame Ellen MacArthur outlines economic opportunity presented by more efficient design