Sentences with phrase «current aircraft engines»
All the bio-version lacks are the aromatics — specific volatile hydrocarbon rings that are necessary to swell shut seals within current aircraft engines, hence the need to blend it with conventional fuel.
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It is therefore highly relevant to consider the current and possible future effects of aircraft engine emissions on the atmosphere.
In addition, the Endangerment Rule authorizes or obligates EPA to establish: (1) greenhouse gas emission standards for heavy trucks, marine vessels, aircraft, locomotives, and other non-road vehicles and engines; (2) greenhouse gas performance standards for potentially dozens of industrial source categories; and, (3) national ambient air quality standards (NAAQS) for greenhouse gases set below current atmospheric concentrations.