Case in point: contrails, those wispy white lines that trail some airplanes flying high in the sky.
Contrails, short for condensation trails, are produced when exhaust from jets mixes with water vapor at extremely high altitudes, forming minuscule ice particles.
Scientists have known for decades that in some cases, contrails spread out across huge areas, trapping heat in the atmosphere.
Yet studies have estimated that contrails are responsible for as much as 35 percent of all of the planetary warming attributable to aviation.
“We now know enough about contrails and their impact to know we need to do something about it,” said Andrew Chen of RMI, a nonprofit that promotes sustainability.
Persons:
”, Andrew Chen
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RMI