Lasting change starts with small steps in the right direction. There is a saying, "no matter how far you go down the wrong road, turn back." Let's stop arguing about doomsday, and turn back.
Sorry to tell you this, Marianne, but the climate crisis is over. Any solution needed to be implemented 30+ years ago. And it needed to be led by global polluters like the US, EU, Russia, China, India, etc. Not Costa Rica and Denmark...