Google celebrates Earth Day 2011 with a cool interactive Google Doodle complete with animated animals that move when you hover your mouse over them.

Earth Day is a day that is intended to inspire awareness and appreciation for the Earth’s natural environment. Earth Day was founded by United States Senator Gaylord Nelson as an environmental teach-in first held on April 22, 1970.

Numerous communities celebrate Earth Week, an entire week of activities focused on environmental issues.