Vapor Trails

Vapor trails, also known as contrails, are cloud lines formed by airplanes burning fuel. These trails consist of water vapor and carbon dioxide, similar to emissions from vehicles. When released in cold, high-altitude air, the vapor freezes into ice crystals, forming clouds. The duration and spread of these trails depend on the humidity at flight level. In humid conditions, trails can extend for miles and mix with natural clouds. Scientists are studying their impact on climate, as they may block sunlight or trap heat from the ground.

Describe the relationship between airplane engines and the creation of vapor trails.

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In what ways can vapor trails be visually distinguished from natural clouds?

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