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Developers have built hundreds of hydroelectric plants in the Amazon basin for their allegedly green energy generated by its complex of rivers, but climate researchers now know hydropower is not as good for the environment as once assumed. Photo: 123rf.com When climate researcher Dailson Bertassoli went to measure greenhouse gas emissions at the Belo Monte hydropower plant in Brazil, the first thing he noticed was the bubbles. Developers have built hundreds of hydroelectric plants in the Amazon basin to take advantage of the allegedly green energy generated by its complex of rivers. But climate researchers now know hydropower is not as good for the environment as once assumed. Though no fossil fuels are burned, the reservoirs release millions of tonnes of methane and carbon dioxide as vegetation decays underwater.

Sao pauloBelo monteDailson bertassoliAndre sawakuchiHenrique sawakuchiEnvironmental defense fundUniversity of sao pauloXingu riverScience advancesஸ்ம் பாலொபெலோ மான்டேசுற்றுச்சூழல் பாதுகாப்பு நிதிபல்கலைக்கழகம் ஆஃப் ஸ்ம் பாலொக்ஷிங்கு நதி