By Viv Forbes
Why are emissions from cows
digesting grain classed as bad, whereas the same emissions from cars burning
grain ethanol are lauded as green and good?
Consider a paddock of corn.
Most of the carbon in the growing plant comes from carbon dioxide in the air
which is converted to plant material using solar energy via the magic of
photosynthesis. Other minor carbon compounds come from the atmosphere via busy
microbes in the soil.
This plant material, either
biomass or grain, can be fed to cattle or other livestock, made into ethanol
for motor fuel, or made into food for people.
All cows, cars and people
then use an internal digestion/combustion process to extract the energy
collected and stored by the corn plants.
In every case, this process
produces gaseous emissions, mainly carbon dioxide.
In cattle and people, some
of the plant’s carbon is stored for a while in flesh and bones. The rest is
emitted as the natural gases carbon dioxide and methane. This methane is soon
oxidised in the atmosphere to produce carbon dioxide.
In cars, virtually every
atom of carbon in the ethanol burned produces one molecule of carbon dioxide.
Over the life of a cow
running on corn or a car running on ethanol, they both produce exactly the same
carbon emissions from exactly the same plant input. Every atom of carbon
extracted from the air by the green plant eventually returns to the atmosphere
as carbon dioxide, the plant food. This is the natural carbon-based cycle of
life.
It is therefore scientific
incompetence or deliberate fraud by global warming alarmists, vested interests
and “scientists” to claim that consuming ethanol in cars is good and should be
subsidised but consuming the same plant material in cows must be rationed and
taxed.
We are told that ethanol is
a renewable energy. Closer inspection shows it ties up a lot of good cropping
land; uses a lot of motor fuel to plant, harvest, and transport the grain; and
then a lot more energy to ferment, distil and distribute it to make up its
mandated proportion of motor fuel. Even more energy is used to make,
transport and apply fertiliser. Growing corn for ethanol is a zero sum game at
best.
We can surely learn from
history.
Back in 2005, US corn
prices were $2.30 per bushel. Then the US Congress mandated the use of ethanol
in motor fuel so that even before the recent US drought, corn prices had risen
to $5.50 per bushel. In 2007, the US Congress increased the quantity of ethanol
to be added to gasoline and the demand for corn again soared. Then the
widespread drought in the US reduced the supply of corn, and corn prices rose
again to a peak of $8.34 per bushel in August 2012. The US is now using 40% of
their corn harvest to provide about 10% of their vehicle fuel.
Such foolishness has
done NOTHING for the climate, but has increased food prices, put more land
under cultivation, increased nitrogen fertiliser use, and caused starvation in
countries dependent on US corn exports.
Ethanol madness has
magnified the effects of the drought - twenty US ethanol plants have closed and
cattle feedlots are closing because of a shortage of grain.
And to cap the foolishness,
ethanol production consumes more energy than it produces. It is an inferior
motor fuel, producing lower km/litre and also damaging some engines.
An ethanol industry propped
up by subsidies and mandates is un-sustainable. It increases the tax burden and
pushes up the cost of grains, beef, pork, eggs, milk and cereals. Subsidising
ethanol brings no benefits for the climate or the environment and harms the poor and hungry of the world.
And should the world move
into a period of natural global cooling, which is at least as likely as a
resumption of last century’s gentle warming, food production will plummet and a
world-wide food crisis will be upon us.
It is time to end the
ethanol con.
No more forcing motorists
to buy it. No more tax breaks for construction of ethanol plants. No more
subsidies or special protection for ethanol speculators. Let ethanol
production compete fairly with all other sources of transport energy.
And let’s have no more
slander about emissions of the livestock industry which, when all is
considered, is greener than the ethanol industry.
Sensible politicians need
to stop pandering to the anti-human green lobby, stop posturing on the world
green stage, learn some carbon chemistry, and stop burning food for fuel.
Viv Forbes is a geologist
and grass farmer who has spent his whole life in the primary industries,
farming and mining, mainly in coal, cattle and sheep. He is self-employed and
should be retired. He fears for the damage being done to the energy and food
industries by baseless scare-mongering about the harmless, non-polluting plant
food, carbon dioxide. He is the founder of the Carbon Sense Coalition