DLR: Climate Impact of Contrails to Grow The climate impact from aircraft contrails will triple by 2050, increasing faster than aviation can reduce its carbon emissions, concludes a new study by researchers at German aerospace center DLR. Contrail cirrus, persistent high-altitude ice clouds produced by water vapor in engine exhausts, can trap heat inside the Earth’s atmosphere. This causes radiative forcing—a difference between the sunlight absorbed by the Earth and the energy ...

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