Angry Birds and Earth Day Network Announce New In-Game Experience to Fight Climate Change for 45th Anniversary of Earth Day

WASHINGTON, April 17, 2015 /PRNewswire-USNewswire/ -- Rovio Entertainment, in cooperation with the Earth Day Network, will announce Angry Birds' "Champions for Earth" – an awareness driving in-game experience – at Global Citizen 2015 Earth Day, on April 18th, at the National...