A tempo limit on the German Autobahn wouldn’t have a big positive impact on the environment. I'd support a general CO2-emission tax (there‘s already a europe-wide emission tax for some industries [0]), but not as big and grand as Fridays for Future demands it - it'd make a lot of things much, much more expensive, and mostly low-income households would be affected, while the green upper middle class would just pay the premium.
However, like Greta Thunberg said: The fast and emotional exit from nuclear power for example in Germany was a wrong move. It could’ve been the best transition to renewable energies. Now, energy in Germany is crazy expensive, but thanks to coal they’re even further away from reaching the paris agreement.
It’s a good thing that Fridays for Future caused lots of discussions and that young people are getting active in politics. But scaremongering does not help. The whole thing smells like climate-populism.
Who says life will be over in 50 years?