The real problem with environmentalism is the classic one of long-term vs short-term considerations. The developed countries of the world enjoy the benefits of (relatively) cheap energy, and absolutely do not *want* to believe in global warming or other environmental consequences. Nobody wants to spend his own money now for clean air or water later.

The case for government intervention is simply that capitalism is fundamentally incapable of taking the long view. Replanting the rain forest is definitely a laudable goal--but the cost of seedlings, property rights, and labor to do it should be borne by energy (and beef) consumers. At least, in an economically rational world.