A dam-building boom across the developing world will bring electricity to growing, power-hungry cities across Asia, Africa and Latin America. But it can also put the world’s climate and people at risk, according to a new study by researchers aiming to reduce the host of environmental problems that can come with dam construction.
Researchers at Tübingen University in Germany have have compiled a database of the 3,700 different dam projects planned or underway worldwide. They predict that global hydropower capacity will double in the next 10 years — an increase set to reduce by 20 percent the number of free-flowing rivers left on Earth.
The building boom also poses a hazard to the rich biodiversity of major river watersheds, including those of the Mekong, Amazon and Congo, on which millions depend.