JesterX wrote:
Making Biofuels from biomass is now of highest priority in the biofuels research community because we all admit the food crops can only replace a tiny fraction of oil usage while biomass could replace as much as 30% with moderate estimates and higher.
…
15 million sq miles of algae farming could displace the entire US fuel demand (on road vehicles). Currently, US agriculture uses over 400 million sq miles of land, 270% of the land requirement for algae.
…
Your arithmetic is way off, which makes the rest of your comment suspect. 400 is (400 x 100) / 15 = 2,667% of 15, not 270%. Grade 4, I believe.