[...Deforestation is a constant threat to the Amazon rainforest. Loggers, cattle ranchers and farmers press to claim ever more of the forest. The Amazon stores vast amount of carbon that would otherwise be in the atmosphere. Deforestation releases much of that carbon into the air. But the Amazon serves other environmental purposes as well. For one thing, the giant South American forest affects the globe’s climate. Scientists are working to better understand that relationship.Here’s the second p]