Pollution Turns Brazilian Rivers Into Carbon Emitters, Study Finds

A global study involving 150 scientists has revealed that agricultural and urban pollution are altering the chemistry of Brazilian rivers. Data from 550 watercourses show that these ecosystems, which should naturally absorb carbon, are now releasing CO2 and methane into the atmosphere. This reversal is driven by the accelerated decomposition of aquatic organic matter caused by human activity and rising temperatures. The findings highlight a critical gap in climate modeling and the urgent need to address water pollution to prevent further greenhouse gas emissions.