"Assuming you're not a short-sighted person, how would a poor country like Brazil protect, without make any money out of it, an area bigger than Europe?"
Leaving it alone - like has been done for centuries - might be one way to protect it. We have also read in the media about Bolsonaro encouraging people to burn down the forests as a right, of shooting down the indigenous forest dwellers, and other such horrific things.
Yes, the rich have become rich by removing their own forests, looting their own citizens, and committing genocide-level destruction and looting of other countries and kingdoms. What's "interesting" about them realising this?
What about the rest of us who already know that looting nature is bad? What about the natives (not just the indigenous) who know (or should know) that it's bad? Why should we carry on the practice of looting nature _just_ _because_ the unapologetic rich nations have realised it's bad?