Today is Earth Day, and you don't have to look any further than the home pages of the top Internet companies to see it. Green is the politically correct color of choice for firms that want to score cheap environmental points online.

The bias is most blatant at Google and its video-sharing subsidiary, YouTube. Google's logo has gone completely green, and the television screen within YouTube's logo is a snapshot of the earth.

YouTube also has turned over the prime real estate on its home page to earth-friendly videos, with headlines like "5 Easy Ways To Save The Planet" and "Veggie Cars." Oh, and don't forget, "Paris Hilton Is Greener Than You."