The advancement of small hydropower dams is far-flung throughout Brazil and some other places of the world, exceedingly overshadowing large hydropower projects. The increase in numbers of these smaller dams is a response to growing energy and security needs. Their increase, however, imposing a threat on many of the remaining free-flowing rivers and biodiverse tropical regions of the world, thereby obstructing the migrations of freshwater fishes, on which millions of peoples’ livelihoods depend.
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Source: University of Washington
School of aquatic and fishery sciences
Image credit: Victor baptista