A study conducted by World Weather Attribution has found that human-induced global warming, not El Nino, was the main cause of the severe drought in the Amazon last year. Both climate change and El Nino played a role in reducing rainfall, but higher global temperatures were the primary reason for the drought. The drought was agricultural, with reduced rainfall and increased evaporation from heat. The study warns that if global warming continues, this combination of low rainfall and high temperatures will become more frequent. The drought highlighted the importance of the Amazon in the fight against climate change, as it acts as a carbon sink.