This month regulators greenlighted a transmission line that would bring power generated from Canadian hydroelectric dams to New York City. New York's plan to achieve a zero-emissions grid by 2040 depends on hydropower, and it's not alone.
Globally hydropower is the largest source of renewable energy. In the United States it makes up 7% of electricity generation, and 37 states allow some form of hydropower in their renewable portfolio standards, which establishes requirements for the amount renewable energy that must be used for electricity generation.
