Goedjn wrote:

... It is yet to be shown that converting
cropland (or non-crop greenspace) to fuel-corn increases
the amount of carbon sucked out of the air by exactly the amount
of carbon pumped INTO the air by burning the fuel-part, and
that's what you have to show for it to be "carbon-nuetral"
....

All green plants get all their carbon from the air in
a process called photosynthesis.

http://earthobservatory.nasa.gov/Lib...on_cycle2.html

This means all biofuels derived from plants get all
their carbon from the air. This means when you burn
biofuels and release that carbon all of it came from
a plant which took it out of the air in the first place.

This means that all biofuels are carbon neutral by
definition. It's an indisputable fact, a truism. It's
so obvious that people don't have to keep proving it
every time the use the term.

Anthony