you mean my hydro powered computer, in my hydro powered AC home,
with my hydro powered lights, etc, etc.... while my vegetable oil fueled
carriage
sets in my garage.
Hydropower only supplies about 7% of US electrical generation. Thats
only enough to satisfy about 20 million people's demand. Where do the
other 260 million get their power from? Also, hydropower isn't very
evenly distributed; there's no way houston has any within a few
hundred miles.
The same sorts of issues crop up with vegetable oil. Running numbers,
according to DoE EIA, about 3 billion gallons of diesel is used on
farms (33 billion gallons trucking and 58 billion gallons
total). According to journeytoforever.org,
gal/ acres harvested
acre (million)
Wheat - 59
Hay - 60
Corn 18 69
Cotton 35 13
Soybean 48 66
Rapeseed 127 ??
Palm 635 ??
For comparison,
Diesel use in farming per acre of cropland: 5.3 gal/acre
Claim (of a pro-biodiesel site) for growing soy 12.5 gal/acre
Diesel use in the economy per acre of cropland: 88 gal/acre
Average (of 270 million acres) of maximum potential harvest per acre:
18 gal/acre
A farm might be able to barely support itself with biodiesel grown
on-site, but it won't be able to fuel much else.
Also, according to the presentation, biodiesel is about 2.5 times as
expensive as diesel, thus they propose diluting it 20:1 to dilute the
price shock. Some of the literature I read discusses the benefit to
soy producers (3-10% price increase) if just 1% of diesel were diluted
to be 1% biodiesel. From this I would speculate that supplying just
the farms (5% of diesel) with 100% biodiesel while expanding tha
acreage used for soy from 10% to 50% would only increase soy prices
3x-10x.)
Sure, biodiesel exists. But its a niche; it can only be used by a
small minority or at great expense.
Scott