I'm pleased that my previous enquiry (about how much alcohol you can get
from potatoes) caused a few smiles but, sadly, I must return to more serious
matters. There are claims on the Net that if you are particularly kind to
algae (which seemingly grow many many times faster than any other green
organisms even if you are not particularly kind to them) they will reward
you with so much biofuel that a mere 4.5 million acres of algal bioreactors
could meet all of the road transport fuel requirements of the United States=
