Hydropower emerged as a dependable way to illuminate American cities in the late 1880s. Not much has changed in 2018; in fact, hydroelectric dams have been the largest source of renewable electricity generation in the United States for over 100 years. But that's all about to change.

A combination of decommissioning of older hydroelectric dams and cumulative investments of over $145 billion in the last decade will combine to knock hydropower into the number two spot in the rankings by 2019 -- to be replaced by wind power. Growth in wind power is expected to continue for the foreseeable future, promising to make the change permanent. Here's how individual investors can take advantage.

Read more at The Motley Fool.