In message om, Dave
Liquorice writes
On Sun, 08 Oct 2006 08:58:14 GMT, Peter Ashby wrote:

It is zero carbon if you ignore the machines used to till the soil,
apply fertiliser, make the fertizer, deliver the fertilizer, harvest
the crop, extract the oil, etc. etc.

I knew someone would mention the machines and process but that *could* be
run on biofuel not dino.

They still have to be built and maintained

and let's not forget the f'queueing massive acreage if fertile land
required to generate the fuel

B-) Fertilizer as you say further down plenty
of **** about, regularly gets spread on the fields round here.

No biofuels operation anywhere is zero emission.

And probably never will be, if your fertilizer comes from cattle they
fart prodigious quantities of methane, another greenhouse gas. B-)

Orders of magnitude worse than CO2 IIRC

On QI ISTR it being pointed out that kangaroos don't fart despite having
a similar diet to cows

Some scientists are trying to find out what bacterium in the kangaroo
gut is responsible for this and to, hopefully, cut down on bovine
gaseous emissions

Of course, you could always collect the methane in balloons attached to
the backs of cows and burn that



... this week's NS has what may well be the solution, algae. You can
take the CO2 effluent from a power plant and run it through bioreactors
that grow algae,

I agree algae or other micro organisms is probably a better method than
waiting for plants to grow, harvest, transport, extract etc.


--
geoff