April 22 is Earth Day in the US and per usual, Apple is celebrating more than pretty much any other tech company.

Apple store workers are busting out their green shirts and turning the Apple logo green. Meanwhile the company has come out with a few ways for fans to participate with Apple Watch challenges, shot on iPhone nature photos and news about Apple’s mangrove conservation efforts.

Apple is on a mission to help save the world’s disappearing mangrove forests.

Mangrove forests suck up a huge amount of carbon dioxide from the air. Half of all mangrove forests on Earth have been lost since 1940, but Apple is making a big investment to help save one particular forest in Colombia in an effort to curb climate change.