April 22 (UPI) -- Google is celebrating Earth Day with a new Doodle. Each letter of the search engine was replaced with Google Earth aerial shots.

Google celebrates Earth Day with unique aerial images assembled to make a special Doodle Google Doodle showcases nature's artistry from locations around the world Earth Day Doodle was made using Google Earth images this year Hot on the heels of a long Easter weekend,

A look at the numbers behind the global call for action on climate change.