Algal biofuel

The New York Times profiles Solix, a company with an intriguing process for collecting solar energy and storing it in fuel:

With the twin goals of making fuel from algae and reducing emissions of heat-trapping gases, a start-up company co-founded by a Colorado State University professor recently introduced a strain of algae that loves carbon dioxide into a water tank next to a natural gas processing plant. The water is already green-tinged with life.