content: I would love to see biodiesel from algae pursued whole hog. It looked like it was worthwhile back in the 1970's, and there have been massive discoveries regarding genetic engineering since then.  It should take only a few decades to develop engineered species that could even compete with traditional oil and gas, and the facilities could be built in non-arable land  where there is plenty of sunshine.  If you then coupled these facilities to processes that emit CO2, you would have a groovy thing going.