Oh, its real, and viable. I have been following algae biodiesel for at least 5 years now, and I whole-heartedly support it. It is the only “green” energy I support, not because I’m an econut, but because its a brilliant idea, I think its viable, can use existing technology and infrastructure, doesn’t need subsidies, and does not require either lots of land, nor crop land if you do it right. Plus, the waste can be either burnt in a coal plant, be used as fertilizer, or even used for feed. Its win, win, win.
If it screws the Saudis and their neighbors - I support it.
Another green energy or unlimited energy that can work is geothermal. Running pipes under warm ground with gas or water to generate steam. Areas west of the Miss have warm ground. The caldera in Yellowstone is real warm.
Geothermal is a like a free nuke reactor. Same principal to generate steam to run turbines.