@Mame,
I don't understand the cult of Greta Thunberg. I have nothing against, she is a typical teenage girl; she knows everything and is annoyed by the stupidity of adults.
What Greta represents is mindless, uninformed hysteria. She has no real expertise and is loose with scientific facts. She has unrealistic simplistic solutions and no concept of making tradeoffs or considering costs versus benfits.
If your movement is being led by science and responsible policy making, that is good. If your movement is being led by an inpulsive teenager...
Again, Greta is no better or worse than any other teenager. It is the people who have turned her into a Saint that irk me.