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The article discusses efforts of the U.S. to contribute its share to prevent greenhouse gases, including the Clean Power Plan of the U.S. Environmental Protection Agency for environmental regulations.

The article discusses the implications of Cross State Air Pollution Rule (CSAPR) issued by the U.S. Environmental Protection Agency (EPA) after a DC District Court decision on August 21, 2012 that EPA erred in its implementation. EPA proposed a system where U.S. states would be required to clean up pollution in excess of significant contribution to downwind states' non-attainment. Throwing out CSAPR does not notably relieve EPA of their responsibility to address interstate pollution.