The nation's shortages are a sobering lesson for a biofuels pioneer
The goal is to understand how burning biomass in South America is affecting local weather and air quality
Sydney Possuelo is among the last, and certainly the most famous, of the sertanistas—men who make a living by conducting dangerous first-contact missions with remote indigenous peoples of the Amazon.
Saving Amazonia's indigenous peoples means not meeting them, insists Sydney Possuelo--a policy of noninterference he hopes to extend, even if others hate it
Occasional but extreme climate could turn parts of the Amazon rain forest into dry savannas