Today on the home pages of Google and Bing are special logos and themes for World Environment Day. Google has a simple Google logo that grows into a green plant, whereas Bing's home page was revamped into the Mooserboden Reservoir near Kaprun, Austria.
Here is the animated Google green logo:
The interesting part is that Google is not taking someone to a search results page when you click on the Doodle. Instead you are taken to environment.google. It is also a Doodle that is not listed on the Google Doodles page.
Bing's theme is above and is just breathtaking.
Forum discussion at Google+.