"Recent scientific discoveries show that the Amazon rainforest might control the climate for much of South America. The theory could mean even more disastrous ramifications for the fragile ecosystem if deforestation continues unabated." Besides being an engine for removing carbon dioxide from the atmosphere, the rainforest seems to pump a "river" of moisture through the atmosphere that is larger than the Amazon itself.
"Scientists Say The Amazon Is Still Teaching Us New Lessons"
Source: NPR, 11/09/2015