Claim: A "chemtrail" can be identified by the length of the white line left behind an aircraft, and how long it remains in the sky.
Fact-check: Long trails in the sky left by planes aren't 'chemtrails' - Full Fact
Verdict: this is untrue. the size and duration of contrails—the white lines often seen trailing behind aircraft—differs depending on atmospheric factors, such as humidity.
Organisation: Full Fact
Author: Charlotte Green
Date published: 2023-12-20T00:00:00