Plane Contrails Have a Surprising Effect on Global Warming

The wispy ice clouds formed by jet exhaust help trap heat near the Earth's surface. But small changes in altitude can dampen the effect, a study says.

Plane Contrails Have a Surprising Effect on Global Warming
The wispy ice clouds formed by jet exhaust help trap heat near the Earth's surface. But small changes in altitude can dampen the effect, a study says.
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