Barack Obama

As Obama preps energy policy, Senate confirms latest version of Waxman-Markey not expected until late September

More than 500 green fuelling stations and 9,000 low-carbon vehicles to be rolled out as part of economic stimulus project

Washington confirms it will not reverse policy of refusing to pay for " congestion tax", despite owing more than £3.4m in unpaid fines

Executive Order expected to require US government suppliers to provide information on carbon emission reduction plans

General Motors, Ford, Chrysler and Johnson Controls all big winners as President dishes out $2.4bn in green car funding

Ex-prime minister calls for increased focus on energy efficiency and forestry, while Obama works towards breakthrough in climate talks

New standards for commercial and residential lighting to be followed by energy efficiency rules for household appliances

President urges Congress to pass bill, as climate envoy confirms US will still oppose deep emission cuts

But green groups accuse senators of watering down proposals as part of compromise package

New report warns climate change is already affecting US through droughts, heat waves, storms and public health threats