Hydropower can be economical, but there are some real questions about how sustainable it will be in the long run. Let's visualize the world's largest hydroelectric dams.
Did you know that the largest form of renewable energy in the world is hydroelectricity? The International Renewable Energy Agency (IRENA) recently released statistics showing that it accounts for 40% of total capacity, surpassing solar (28%) and wind (27%).
Hydroelectric power plants, which are essentially big dams t...
