Jeffrey Ball of the Wall Street Journal reports that landfills all over the country may be capitalizing off the sale of carbon credits for environmental initiatives they already had in place. A pollution credit allows a company to offset their own "carbon footprint" by purchasing credits earned by others for their green initiatives. "The credit system was designed to encourage pollution cuts that wouldn't have happened without a financial incentive. But the credits aren't helping the environment if they're merely providing extra profit for cleanups already made. And dumps already have an incentive to capture methane because selling it can be profitable."