Corporate types care about the environment, too. And now they can connect online at GreenMachines.net, a social networking site devoted to global warming-related corporate social responsibility.

The site, launched September 5, aggregates news feeds about corporate sustainability and green PR.

But the site's most interesting features center around four forums: "The Whistle," about whether corporations are violating laws designed to reduce greenhouse gas emissions; "The Long View," about long-term profit-maximizing, carbon footprint-reducing investments corporations can make; "Value Added," about steps corporations can take toward developing or implementing CO2 capturing or sequestering technologies; and the "Deconstruction Zone," about the accuracy of a company's corporate environmental responsibility report.

If used widely, this could leave a much greater impact than getting everyone out of the office to paint homes for a weekend. This could be a venue for unleashing truths about corporations' policies including unveiling "greenwashing" hypocrisy, sharing tips and incentives to improve corporations' effects on the environment, and rewarding companies doing well.