> A global body needs to be created to handle environmental policy
I think some people have too much faith in the ability of politicians and bureaucrats to protect the environment.
A better solution would be decentralized decision making. Place ownership of the rain forest in private hands and let the market determine the most valuable use of the land. If a sufficient number of people believe the rain forest should be set aside for environmental preservation they will have the ability to act on that belief.
Letting politicians and bureaucrats decide will do nothing to preserve the rain forest or environment short- or long term.