Aviation is responsible for around 2% of emissions, but it’s also the global connector. While we should refrain from flying when possible just counting on individuals to take the best behavior won’t work.
What should be done:
ban private jets
end all the tax perks for aviation, which allow for insanely cheap tickets that promote senseless flying
end short over-land flights
simplify ticketing and reduce prices on international trains in Europe, it’s almost always too expensive to cross borders by train in Europe, it makes no sense.
We need aviation, but we also need it to be sensible in a warming planet.