WASHINGTON: 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.
So called run-of-river dams like Belo Monte along the Xingu River, which have smaller reservoirs and channels allowing reduced river flow, were meant to address the problem, but a study Friday in Science Advances found that has not been the case. "Once you have the flooding of dry land, the organic matter that was trapped in the soil starts to degrade," the professor of geology and climate change at the University of Sao Paulo told AFP.These were the source of the bubbles he saw at one of the plant's reservoirs.
Environmental groups protested the loss of the forest that had to be cleared for the site while indigenous groups resisted the loss of flooded land and redirected or siphoned natural river flow.
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