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Index/Organizations/German Aerospace Center

German Aerospace Center

Research center of the Federal Republic of Germany for aerospace and power engineering, transport and security

Fact-Checks

2 results
Dec 13, 2025
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What evidence do scientists cite that contrails are normal aircraft condensation trails?

Scientists point to measurements and established atmospheric physics showing contrails are clouds of ice crystals formed when water vapor in jet exhaust (and ambient air) condenses and freezes on part...

Jan 24, 2026

What scientific studies have directly tested aircraft contrails for toxic chemicals and what did they find?

Direct, peer-reviewed measurements of aircraft exhaust and contrails exist but are narrow in scope: field campaigns and laboratory analyses have sampled engine exhaust and contrail particles and docum...