Wikipedia article "Biodiesel"
http://en.wikipedia.org/wiki/Biodiesel#Production
states that area slightly larger than Maryland would be sufficient to replace all the
U.S. motor fuels with biodiesel if we grow it from algae.I think such territory could be easily found in some shallow sea and not much larger than territory recently
polluted and devastated by oil in Mexican gulf.Also I would be glad to know what
would be physical limit to plant biodiesel production if we use all genetical engineering possible?I guess estimates for algae take in account flat area covered
by algae,but what if we interbreed algae and some very tall trees to produce biodiesel?Could it reduce area even further?