EPA

Decision to delay tighter smog rules branded "illegal and irresponsible"

Minor change to Cross-State Air Pollution Rule will lead to increase in emissions

Affected coal and gas plants may be able to emit up to four per cent more than previously planned

Administrator Lisa Jackson admits the agency will miss target to float new utility-focused proposals by end of September

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"