Google doodle celebrates Earth Day 2013 with some of the best Featuring on the search engine's homepage,where users can play and pause a moving 'sun' or 'moon' on four different images

Earth Day is held every year on April 22 to highlight green issues.The first ever Earth Day was held in 1970, although the name and concept was pioneered a year earlier Planting trees in the most common way people support the day.
Friends what are you gonna do this earth day, plant a tree and make earth smile?
Think about it.