EPA

Court filing slams "excessive and inexcusable delay" to promised air quality standards

Agency delays smog rules, but moves to tackle oil and gas industry air pollution

EPA reveals it will not finalise new air quality standards this week as expected

Democrats and Republicans clash during heated debate on latest GOP bill attacking EPA and green regulation

Tough new targets to cut emissions from US power plants

Judges rule against bid to curb power companies' output by declaring their emissions a "public nuisance"

Environmental agency reportedly considering two-month postponement to unveiling of emissions performance standards

Rival energy bills again blocked in Senate, as EPA controversially halts efficiency rules

Coalition of environmentalists claim government has failed to protect the atmosphere

Landmark case to decide whether states can sue carbon intensive firms on the grounds they represent a "public nuisance"