You need electricity and you need to preserve the forest.

FORBES: Ex-Pres Clinton Criticizes Hydroelectricity in Amazon

But talk of financial incentives for forest-owners to preserve their trees is in the air, and a deal may be struck at the United Nations climate-change meeting being held in Copenhagen in December.

ECONOMIST: A new experiment is setting the Amazon on fire

This program pays farmers to convert cropland into grassland or forest, in order to preserve soil and create more habitat for wildlife.

NPR: Crop Cops Take to the Sky

"As long as dead forest is worth more in the market than living, standing forest, it's going to be a very tough, uphill fight to preserve very much, " says Stephan Schwartzman, director of tropical forest policy for the EDF.

FORBES: Thought Leaders

At the Sariska Wildlife Preserve in India, there is thick forest, there's plenty of water and plenty to eat.

NPR: Poachers Put Bengal Tiger in Additional Peril