Rovio partnered with the United Nations on an in-game promotion in ANGRY BIRDS 2 designed to raise awareness for climate change.

The partnership with the United Nations promoted the UN's Trillion Tree Campaign dedicated to reforestation. The partnership consisted of an in-game ANGRY BIRDS 2 event where players were able to dress their flock with new outfits and show their support by popping as many pigs as possible.

All the in-game activities directed players to the United Nations Trillion Tree Campaign which was committed to planting one trillion trees by the end of the decade.