Today is Earth Day and Google, Bing, Ask.com, Dogpile and others have special logos and themes up for the special day. They actually do this every year including last years Google pop quiz.

This year, Google has a set of five different Doodles, special Google logos, for earth day by Doodler Sophie Diao. Here they are:

Here is Bing’s home page:

This image has been removed because of fear of being sued over copyright…

Here is Ask.com:

Dogpile:

And us:

Forum discussion at Google+.