Sentences with phrase «by aircraft exhaust»

Here's a NASA Release 04 - 140 «Clouds caused by aircraft exhaust may warm the U.S. climate» (April 27, 2004)[Emphasis added]

Not exact matches

Will the environment be damaged by hundreds of these aircraft flying at high altitudes and throwing their exhausts into the stratosphere?

By TARA PATEL Aerospace manufacturers are pressing ahead with their plans to develop the next generation of supersonic jetliners despite renewed uncertainty about the environmental impact of exhaust emissions that could ground the high - speed aircraft.

Completed by V12 Vantage S graphic to rear decklid and unique «heat aged» exhaust tailpipe finishers, produced in conjunction with Aircraft Restoration Company (ARC).

Those of us involved in that research are motivated entirely by concern over the suffering of humans and non-humans alike due to climate change, and we think there is sufficient cause for alarm about the future to do the research into the idea of putting something like sulfate (not a significant part of aircraft exhaust) into the stratosphere (higher than the airplanes you see making contrails).

Contrails are produced by hot aircraft engine exhaust mixing with the cold air that is typical at cruise altitudes several miles above Earth's surface, and are composed primarily of water in the form of ice crystals... Researchers are most interested in persistent contrails because they create long - lasting, and sometimes extensive, clouds that would not normally form in the atmosphere, and are believed to be a factor in influencing Earth's environment.

NASA scientists have found that cirrus clouds, formed by contrails from aircraft engine exhaust, are capable of increasing average surface temperatures enough to account for a warming trend in the United States that occurred between 1975 and 1994.