How did Avatar Earth become totally deforested?

[Devourment]

Originally Posted by PunkMaister

Actually that's not entirely true, the overpopulation problem is centered around the developing world specially Africa and not the developed world where Birth rates if anything have declined.

Haiti is a poor example as is the poorest nation on the face of this planet.

If in this age a country can be like that, how do you expect it will be in 150 years when there's 20 billion people running around?