Algae Biofuel Anyone?

CSInman commented on my tree rant that algae is less sexy than trees but very efficient at dealing with CO2. So true. Blue-green algae would be one way to terraform Mars, producing oxygen for us folk. Hey, I AM a SF writer after all. But speak of the devil, or algae for that matter, and what did I turn up in the IEEE Spectrum online, but a very cool little project to vertically raise algae for biofuel production. Not only is is a smaller footprint than a soybean field, those soybeans, or rice, or wheat can have their good, arable soil. All you really need for the algae is solar energy, nutrients, and water. Take a look!