Avoiding the creation of planet-warming contrails is considered one of the cheapest ways to cut aviation’s impact on the environment — but even marginal costs mount when jet fuel prices spike.
http://dlvr.it/TV4wPH
Avoiding the creation of planet-warming contrails is considered one of the cheapest ways to cut aviation’s impact on the environment — but even marginal costs mount when jet fuel prices spike.
http://dlvr.it/TV4wPH
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