CO2

But renewable energy funding needs to double to $500bn annually to limit global warming, UN study warns

First of two biogas energy plants turns chicken manure into green electricity

New EPA rules will require around 10,000 heavy polluters to report on their 2010 greenhouse gas emissions

State think-tanks suggest government impose carbon tax scheme by 2013

Latest report from Carbon Disclosure Project suggests emissions reporting has entered the corporate mainstream, but bosses want more guidance from political leaders

Study suggests future livestock breeding plans could result in lower greenhouse gas emissions

Draft laws underway to reduce greenhouse gas output

Facility promises to reduce air pollution and cut carbon emissions by between 20 and 25 per cent

Upgraded online system to make it easier for firms to report on carbon emissions in line with international standards

Rich nations need to cut CO2 emissions 90 per cent, says national think-tank