To mark Earth Day, Google has also raised awareness of one of the world's most pressing and important problems - climate change.
It's not unusual for Google to create a unique graphic or animation to mark a special holiday or special event, and display it on the homepage in place of the familiar logo. On Earth Day, the search giant is highlighting the impact of climate change in four different locations to draw attention to the already visible consequences of global warming.
The Kilimanjaro in Africa:
Greenland glaciers:
The Great Barrier Reef off the coast of Australia:
The Harz Mountains in Germany:
Shocking data and research on the negative impacts of climate change are emerging week after week. One of the latest discovery says that rising temperatures will soon mean fewer and fewer large bees in the world, which will have a major impact on crop pollination.