alt.energy.renewable

Royal Society of Engineers:
"Growing and burning many biofuels may actually raise rather than
lower greenhouse gas emissions,
a new study led by Nobel prize-winning chemist Paul Crutzen has shown.
The findings come in the wake of a recent OECD report, which warned
nations not
to rush headlong into growing energy crops because they cause food
shortages and damage biodiversity."

Crutzen and colleagues have calculated that growing some of the most
commonly used biofuel
crops releases around twice the amount of the potent greenhouse gas
nitrous oxide (N2O) than
previously thought - wiping out any benefits from not using fossil
fuels and, worse, probably
contributing to global warming. The work appears in Atmospheric
Chemistry and Physics and
is currently subject to open review."

Full: /chemistryworld/News/2007/September/