Amazon founder Jeff Bezos on Monday announced the launch of a new Earth Fund that the e-commerce chief plans to use to combat climate change.

He said that he’s pledging $10 billion to start the fund, which will be called the Bezos Earth Fund and issue grants to climate-oriented scientists and activists.

“We can save Earth,” Bezos wrote on Instagram. “It’s going to take collective action from big companies, small companies, nation states, global organizations, and individuals.”