Do you ever see this kind of sky https://www.spiegel.de/wissenschaft/technik/kondensstreifen-forscher-empfehlen-neue-flugrouten-fuer-mehr-klimaschutz-a-ce0138a6

Do you ever see this kind of sky https://www.spiegel.de/wissenschaft/technik/kondensstreifen-forscher-empfehlen-neue-flugrouten-fuer-mehr-klimaschutz-a-ce0138a6-3765-49a6-b330-9d6bfcb7565a https://www.spiegel.de/wissenschaft/technik/kondensstreifen-... ? That's over Frankfurt, Germany's busiest airport. Also from the 2020 article (v. G. tr.): > Researchers believe that the ice clouds created by contrails have contributed more to the rise in global temperatures in recent years than all the CO2 released into the atmosphere since the beginning of aviation. The annual increase in air traffic and flight routes at ever higher altitudes are particularly contributing to the formation of ice clouds. At high altitudes, contrails can combine with icy cirrus clouds and thus remain in the sky for up to 18 hours.