You can thank this blog post for even more carbon emissions in the atmosphere. That’s because Web hosting is largely powered by fossil fuel power plants and computers run on electricity. To help bring a little carbon transparency to Web sites, including those in our good ol’ blogosphere, two student entrepreneurs–Alex Wissner-Gross at Harvard and Tim Sullivan at Yale–have developed the CO2 Stats Project, a widget that tracks visitors to Web sites, calculates the sites’ carbon emissions and offsets the lot. Wissner-Gross and Sullivan tell us that their widget, launched at the end of October, has grown to more than 1 million unique visitors viewing it each month across about 700 sites.

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