Icelandair has announced ambitious plans to fly only ​"carbon-free" aircraft on all its domestic routes before 2030, which would make it the first airline to have carbon-free domestic aviation. For Icelandair, Sweden's Heart Aerospace is developing a 30-seat regional aircraft powered by batteries and a backup conventional engine and Universal Hydrogen, based in Los Angeles, is converting its existing 37-seat turboprop plane to use a hydrogen fuel-cell system. Icelandair only operates three domestic routes, the longest just about an hour. While most of aviation's carbon dioxide emissions come from large planes traveling over long distances, experts say smaller aircraft making short trips can eliminate harmful air pollution and noise disturbances at airports and neighboring communities and reduce competition for the sustainable aviation fuel or hydrogen that will eventually power larger aircraft.

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