On August 15, one day before announcing final regulations for heavy duty vehicles, the EPA took the first step towards curtailing GHG emissions from commercial aircraft with a finding that these emissions endanger the public health and welfare. With large commercial jets accounting for 12 pct of all emissions from the US transportation sector and 29 pct of all global aircraft GHG emission, this is significant move towards the Obama Administrations effort to reduce all GHG emissions up to 28 pct by 2025. The finding requires that the EPA develop standards for the regulation of aircraft GHG emission, in alignment with international measures to be taken by the UN agency ICAO.
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