EPA

US watchdog continues drive to improve corporate reporting on potentially hazardous chemicals by adding 16 substances believed to be carcinogenic to public inventory

Senators divided on whether revenue from new climate bill tax should pay for green projects or road repairs

Vehicle standards finally adopted formally in a move that should cut US vehicle emissions by around 15 per cent

Lisa Jackson argues that curbing carbon regulations would damage the economy

Virginia senator tables bill that would stop the EPA regulating power station emissions for two years

Republican at centre of bi-partisan effort to produce compromise climate bill says new mechanisms will be used to curb emissions

Democrat Congressmen back controversial resolution to strip watchdog of its right to regulate greenhouse gas emissions

Department of Transportation warns that attempts to block the EPA regulating carbon emissions will drive up costs for car firms and motorists

As Republican senators challenge climate science consensus, UN Secretary General urges leaders to resist climate sceptics' attempts to derail international negotiations

But agency signals that it will undertake gradual rollout of new carbon-permitting regulations