When man first appeared on
Earth he had no implements, no clothes, no farms and no mineral fuels – his
only tools were his brains, hands and muscles.
Everything that enables mankind to
live comfortably in a world where nature is indifferent to our survival has
been discovered, invented, mined or created by our inventive ancestors over
thousands of years.
The history of civilisation is essentially the story of man’s
progressive access to more efficient, more abundant and more reliable energy
sources - from ancestral human muscles to modern nuclear power.
There are seven big steps on the human energy ladder – fire, farming,
solar power, gunpowder, coal, the steam engine and nuclear power.
Man’s first and greatest energy step was discovering how to harness
fire for warmth, cooking, hunting, metal working and warfare.
For centuries the main fire-energy fuels were organic natural resources
such as wood, charcoal, peat, grass, animal dung and fats/oils extracted from
animals and plants. As human population increased, these energy sources became
scarce as the land and seas around towns and villages were stripped of their
natural carbon fuels.
The second step on the energy ladder was built when some smart
hunter/gatherers discovered how to access more reliable energy from
domesticated animals and plants. Sheep, cattle, goats and pigs provided a
steady supply of carbon-based food energy, and dogs, horses, donkeys and camels
multiplied human energy for transport, hunting and warfare. Farmers also
nurtured fruiting trees and grasses such as einkorn, wheat, rice, barley, oats,
corn and sugar cane. These provided more dependable and abundant food energy
for humans and their animals.
About this time humans ascended the third step on their energy ladder –
the ability to harness wind/hydro/solar power for sailing ships, windmills,
water-wheels, grain mills and drying food. The low energy density and
unpredictability of these weather-dependent energy sources was obvious, even to
our ancestors.
The fourth big step was the invention of gunpowder by the Chinese, which gave humans the first glimpse of the enormous power of concentrated chemical energy. This led to the widespread use of explosives for hunting, armaments, mining, civil engineering and entertainment.
The fifth energy step was a bigger one - the discovery of how to obtain
and use coal, and centuries later, oil and gas. The energy density and
abundance of these hydro-carbon fuels gave an enormous boost to human access to
energy, and massively relieved the pressure on forest fuels and animal fats.
The sixth step on the energy ladder was truly gigantic - British
inventors and engineers built the first practical steam engine. That invention
transformed the world. Suddenly steam engines were moving trains and ships,
pumping water, generating electricity and powering factories, traction engines
and road vehicles. Most steam engines were driven by coal, but wood, other
hydro-carbons, concentrated solar energy or nuclear power could be used.
Steam cars and electric cars got a good work-out over 100 years ago,
but neither could compete with a new invention - the oil-powered internal
combustion engine. This small but powerful engine resulted in the replacement
of steam and electric motors for mobile engines but the mighty steam engine
still dominates electricity generation.
These two engines, running on powerful hydrocarbon fuels, feed and
mobilise our world. The transformation is remarkable. Just 3-4 generations ago,
a team of up to twenty bullocks took days or weeks to haul a wagon-load of wool
bales, forest logs or bagged wheat to markets, and the bullocks needed fresh
supplies of feed and water every night. In 1896, Henry Lawson described it well
in two stanzas from his great Australian poem “The Teams”:
Cattle and sheep to feed the cities were moved by drovers who spent
weeks or even months on the road. Today one diesel-powered road train or
semi-trailer can carry its own fuel and water plus a load of livestock to the
distant cities in a day or so. Refrigerated trucks do even better – swiftly
carrying dressed sides of meat from the abattoir direct to butcher shops.
The seventh step in the human quest for additional energy was the
harnessing of atomic energy for generating electricity, fuelling naval vessels,
in medical procedures and creating even more powerful explosive devices.
As mankind was ascending the seven steps of the energy ladder from the
stone-age to the nuclear age, governments were also expanding their scope,
power and cost.
Mankind has always had tribal leaders, but when farming developed,
leaders or powerful land-owners discovered that other farmers and their fixed
assets could easily be taxed to pay for their own “protection”. This encouraged
the development of central governments with their officials, tax collectors,
police and soldiers. To defend their generally increasing appetite for tax
revenue, governments needed a continual supply of real or imagined dangers to
justify their taxes.
From this point on, government power has increased with each real or
invented community crisis – from village control, to district, state, federal
and continental governments. The latest such “crisis” concerns “global warming”
or “the climate crisis”, which is being milked to promote global carbon taxes
and global government.
Nothing stands still on planet Earth. Since the dawn of time, Earth has
seen continual geological and climatic change – shifting continents, rising and
falling sea levels, volcanos and tsunamis, droughts and floods, migrations and
extinctions, hurricanes and heat waves, ice ages and warm eras.
Humans flourished in the warm eras and suffered in the cold dry eras.
Access to abundant, reliable energy enables man to survive these and the future
climate challenges which are sure to come.
Today’s massive global human population owes its existence, prosperity
and comfort to our economical and reliable energy supplies, particularly the
hydrocarbon fuels – oil, coal, and gas. The world supports more people with
fewer famines; and those with access to abundant reliable energy supplies have
stabilised their populations and contribute most to caring for nature, culture
and the poor. And the carbon dioxide recycled by the usage of hydrocarbon fuels
is greening the world and adding to food supplies as native and farmed plants
flourish in the warm, moist, carbon-rich atmosphere.
This long history of energy progress is now under threat from strong
forces using any environmental alarm to deny human access to efficient energy.
Using every sensational scare that can be whipped up, they tax, oppose, hamper
or restrict farming, forestry, fishing, grazing, mining, exploration,
hydro-carbon fuels, steam engines, combustion engines and nuclear power. The
“zero-emissions” zealots want us to step backwards down the energy ladder to
the days of human, animal and solar power. They have yet to explain how our
massive fleet of planes, trains, tractors, harvesters, trucks, road trains,
container-ships and submarines will run on windmills, treadmills, windlasses,
solar energy, and water wheels.
But their energy-destroying policies will reduce global prosperity and population back towards levels prevailing in those times. Some see that as a desirable goal.
These green zealots are the real deniers – the energy
deniers.
By Viv Forbes
Viv has a degree in Applied Science Geology and is a Fellow of the
Australasian Institute of Mining and Metallurgy (cartoons by Steve Hunter)
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