Following up on the New York Times piece on large corporations taking greener steps, CNet explores the following question we’ve all been asking ourselves as we drift off to sleep each night: which is greener, Microsoft or Google?

Being portals and search engines, the companies are likely among the worst energy users because of the cooling and energy their data centers need to operate. When asked, company representatives did not say what, if anything, the data centers are doing to improve efficiency and reduce energy. No doubt, Google and Microsoft, two of the top Internet sites in the world, use massive amounts of electricity to power and cool their data centers. But outside of the electricity that makes the businesses run, they are among the leading adopters of so-called green policies in corporate America. Subsidies for buying Priuses? Check. Solar panels? Check. Hormone-free chicken in the corporate cafeteria? Check. Between them, they’re doing a variety of things to try to make the Sierra Club, organic farmers and Al Gore proud.

So who is the greenest of them all? While it’s nearly impossible to make a judgment, both tech titans seem to have made Earth-friendly policies a priority.