American Airlines and Google were able to cut contrails made by jets by more than half during a small trial, a move that could significantly reduce the global-warming footprint of the travel industry, but with a slight increase to fuel use.
As the airline industry pushes and waits for more sustainable fuels and alternative power engines, many major carriers have shifted focus to the emerging field of studying contrails, once considered an innocent by-product of water vapour at high altitudes.
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