Source access date: 10 July 2026.
The strongest evidence-based alternative is selective contrail climate control, not a fleet-wide toxic-spraying program:
Aviation operators can already choose whether ordinary-looking ice contrails form by changing routes or altitudes. The same control architecture being tested for contrail avoidance can select daytime routes that intentionally produce cooling contrails. Aviation researchers have explicitly proposed, patented and modeled this as a climate intervention.
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