“The vast majority of aeroplanes are now hydrogen powered, or use some combination of hydrogen and other renewable energy.”

Created by gwern on 2011-09-25; known on 2050-01-01

• gwern estimated 25% on 2011-09-25
• gwern said “http://www.futuretimeline.net/21stcentury/2050-2059.htm#air-travel-2050” on 2011-09-25
• gwern said “I think even if peak oil comes, it’ll still be cheaper to power planes with synthesized oil/gas – what else is as dense? everything serious I read about hydrogen and batteries emphasizes their bad power-weight ratio. but 2050 is far away” on 2011-09-25
• themusicgod1 estimated 36% on 2016-10-09
• pranomostro estimated 15% on 2019-01-01
• pranomostro estimated 30% on 2019-01-01