Why aren't we seeing this kind of pilot-project at US cement plants?  In Canada, St. Mary's Cement Company and the Ontario government have teamed up with Pond Biofuels to use an algae bio-reactor to absorb the Greenhouse Gas pollution from the plant. The algae in turn can be converted into an ingredient for industrial production or used as a fuel. Initially a 4300 gallon-capacity reactor, provided a small example of how this system works with an industrial host. By the end of the year, that will be scaled-up to over 26,000 gallons of capacity, and then to a full-scale commercial operation by 2014. According to Ponds, St. Marys could then create up to 250,000 tonnes of algae, which could produce 29 million litres of biodiesel fuel. It's free pollution control for the cement plant and produces a commercial product Ponds can sell. These are the kinds of innovations and pollution reduction projects that could be encouraged by new EPA rules to cut Greenhouse Gas pollution - if they ever get implemented.