They visit my blog... now I visit them.
They have a patented Emissions-to-Biofuels™ (E2B™) process harnesses photosynthesis to grow algae.
With the DOE supporting this... we wish GreenFuel Technologies Corp. the best.
If you need a few EHS pro's to help, let me know ;-)
From their website: (click here to read more)
How It Works
The Emissions-to-Biofuels™ process is a flexible platform for converting CO2 emissions into a range of renewable fuels. The process is designed to be retrofitted to flue stacks with minimal impact to ongoing operations. The process schematic diagram is shown in the following figure: 
Proven tech - The bioreactor productivities suggest annual yields of 5,000-10,000 gallons of biodiesel and a comparable amount of bioethanol per acre!
