Hydropower is derived from the force of moving water. Electricity is produced when falling water at dams rotates turbines. Despite their lack of air pollutants, large hydropower projects do disrupt the natural flow of rivers and can have a significant impact on landscapes and ecosystems.

Hydropower technologies are familiar in New York State, with their use dating back over 100 years. Today, about 19% of the electricity produced here comes from the hydropower facilities located at Niagara Falls, on the St. Lawrence River, and elsewhere. This legacy provides New York with an excellent base of pollution-free renewable energy, as well as resource diversity.