Source -Microsoft has been offering hobbyists and professional photographers various chances to get their images as the default background for the Bing search/decision engine, and the Bing Earth Day Photo Contest needs to be added on the list. However, entries in the Bing Earth Day Photo Contest are limited to students starting with the age of five. And just in case the name is not a dead giveaway, the Bing Earth Day Photo Contest is Microsoft’s way of participating in the celebration of Earth Day, April 22nd.
Bing Earth Day Photo Contest - Now live for students - Softpedia