Why not instead just have foreign govts buy and own the Amazon, instead of ranchers? Let the govts of the world, especially the Paris Climate Accords signatories, collectively own the Amazon and put it all into a nature preserve that can’t be mowed down and turned into farmland?

It would still be under Brazilian jurisdiction and law, of course, and the Brazilian govt would likely be contracted to run such a preserve. But the property rights would be owned by an international group of govts who do not allow destruction of the forests on their property.