What will Pokemon Go users be rewarded for doing on Earth Day?

Niantic, the developer behind the popular augmented reality game Pokemon Go, announced Wednesday that it is teaming up with local non-governmental organizations (NGOs) worldwide to encourage trash cleanup activities through the platform.

The idea is to get players to convene in a public area on Earth Day, April 22, and then clean it up together. The more people that show up and participate, the more rewards they will unlock in Pokemon Go.

“Earth Day is an incredible movement and opportunity to team up with friends and neighbors to focus on making the world and our own communities healthy and sustainable,” said John Hanke, CEO of Niantic, in a statement.