Are you celebrating Earth Day? This year on April 22, more than one billion people "acknowledge the amazing planet we call home and take action to protect it."
This year Earth Day is looking at "The Face of Climate Change" with a crowdsourced photo mosaic from individuals, organizations and companies across the world.
One company that always marks Earth Day is Google. Since 2001 it's produced a specially-designed Doodle every year.
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To celebrate this special occasion, we've gathered all the Doodles. Take a look through our green gallery above. Let us know in the comments what you're doing to mark Earth Day this year.
SEE ALSO: This year's doodle, by the way, celebrates water.