If you read ecology books printed in the 70s and 80s, they were absolutely convinced that whales and tigers would not survive the century. There's a whole plot in Star Trek about how whales are extinct actually. Here in Argentina, we were sure that yaguaretés would have gone extinct. It was thought that rainforests would be forever lost, because there was no way that such complex ecosystems would be restored.
Now, you can go to Península Valdés and find that the whale population there is growing year after year, people can see them from their windows. In Iberá, where yaguaretés were extinct for over 70 years, there's now a population of 35 and growing, after being reintroduced just five years ago. As for rainforests?
We've becoming very, very good on restoring them. Natural environments, when given space and time to heal, can return to that they were. And after all, all natural enviroments are managed by human societies. It is up to us to implement a good management, un buen gobierno.
I firmly believe our children and grandchildren will see a restoration of Earth like never before.
Millions of people are working on this. You can learn about it, perhaps even become one of them. Or be a pointless doomer in my ask box. Your choice.