Investment

The price of complying with aviation emissions trading scheme is the same as half a chocolate bar – and other lessons from the week

Seven provinces and cities told to make final preparations in bid to help China reduce carbon intensity 17 per cent by 2015

WRAP urges anaerobic digestion developers to apply for loans of up to £1m to build new green gas plants

Rush for expiring Federal loans helps global investment reach a new high of $260bn in 2011

Airline insists modest levy is needed to cover €15m cost of complying with EU emissions trading scheme

Senior official signals support for carbon tax, but warns that integrating it with carbon trading plans could be complicated

German utility to expand wind and biomass energy capacity in the UK and Poland, as well as step up North Sea offshore wind investment

Western Climate Initiative market expected to overtake established Regional Greenhouse Gas Initiative, doubling volumes traded

Oil giant expands partnership with Sempra Energy to build two giant US wind farms

But falling prices mean global market is worth just four per cent more than in 2010