I liked this comment today in the NYT comments section, on the nuts in Brazil:
The amount that should be offered to Brazil should be billions not millions. It must be made economically to Brazils benefit to maintain the Amazon as it is, rather than develop it. The industrialized nations have developed and decimated their forests and reaped the economic benefits. And now they want to tell Brazil not to do the same, and here's 22 million, and you figure it out from there. There should be a world fund set up to pay Brazil to conserve the Amazon. And based on the importance that rainforest is to the rest of the world, billions is not too big a price to pay.
The only point I would add is that temperate forests are relatively easy to regrow. Forests that were cut down in New England and elsewhere in the Eastern U.S. grew back when the grain belt shifted west to the prairies with their better soils.
This won't happen so easily, if ever, in the Amazon. Many anthropologists (I follow that field) think it probable that humans with herds of goats led to the Sahara being its present size. There is lots of evidence that the Sahara region was lush, grasslands and forests, about eleven thousand years ago. When you artificially and rapidly decrease vegetation, though overgrazing and fires, you can turn verdant land into desert. For a very long time. We really need to consider a world fund to subsidize Brazilians leaving their rainforest alone. If they can profit from being world-lungs, they benefit along with the rest of us. First step: get rid of that ignorant demagogue who, like Trump, doesn't care if he ruins his beautiful country, so long as he and his cronies can take a quick profit.