WASHINGTON — Billionaire environmental activist Tom Steyer announced Monday he will spend $30 million to get young voters to the polls to help Democrats in this year’s midterm elections.

Steyer is a former hedge fund manager who has invested some of his wealth in an array of political causes, most notably fighting climate change. Forbes estimates his wealth at $1.6 billion.

Steyer has advocated for President Donald Trump’s impeachment. He said he knows that the effort is making “some of our friends and allies in this city uncomfortable.”