I don't have numbers for you, and I don't buy "clean coal", but I would counter with this question; is it better to build a solar or wind farm, or to retrofit a

I don't have numbers for you, and I don't buy "clean coal", but I would counter with this question; is it better to build a solar or wind farm, or to retrofit a coal fired power plant to burn algae? And then to recycle that carbon into more algae? Isn't that a kind of solar power plant? (Getting your hands of negatively-value nutrients in order to make the system work is left as an exercise. Or I just don't have all the answers.)