Environment: Global warming responsible for Amazon's worst ever drought

Brazil's National Space Research Institute (INPE) claims that the Amazon's worst ever drought was caused by global warming and not El Nino as previously thought.

INPE researcher Carlos Nobre said of the 2005 drought, "The idea that a drought comes with every El Nino is simply not correct...El Nino does not affect the southwestern Amazon region."

"The temperature of the North Tropical Atlantic in 2005 was among the highest in many years, and our meteorological analysis shows it triggered a low pressure system above these waters," said the INPE's Jose Marengo, who led the study.