Environmental Engineering Reference
In-Depth Information
6 The Price of Energy Consumption
6.1 Energy and the Environment
It was a town of machinery and tall chimneys, out of which interminable serpents of
smoke trailed themselves for ever and ever, and never got uncoiled. It had a black canal
in it, and a river that ran purple with ill-smelling dye, and vast piles of building full of
windows where there was a rattling and a trembling all day long, and where the piston
of the steam-engine worked monotonously up and down, like the head of an elephant
in a state of melancholy madness.
(Dickens 1995 )
Charles Dickens called the setting of Hard Times Coketown. Like many English towns and
cities in the nineteenth century, it was defined by the dirty process of producing coke, a coal
by-product used to make steel. England was the cradle of the Industrial Revolution, and by
Dickens's time it was clear that this was a very messy baby. To appreciate the environmental
impact of the world's first wave of industrialisation, we need to look outside Europe and
North America, to countries like China, India, Brazil, and Indonesia that are riding the
latest wave. Manchester, Duisburg, Pittsburg and Turin are no longer foul-smelling and
coal-blackened, to a large extent because Beijing, New Delhi, São Paulo and Lagos are. As
in Dickens's time, the environmental footprint of human societies is intimately linked to our
consumption of energy.
Long before our energy-devouring societies began to pollute the planet's air and water,
agriculture put the stamp of humans firmly on the land. Intensive agriculture initially
supported a growing rural population, but from the eighteenth century, farm mechanization
pushed, and urban industry pulled, millions of people into cities. The mechanization of
agriculture changed humankind's relationship with the land. We went from a sense of
dependence on its bounty to one of almost infinite control over its 'products'. 1 The
progression from rural, decentralized, and low-energy societies to urban, centralized and
high-energy ones has largely run its course in wealthy regions, but is still ongoing in most
of the world. 2
Urbanisation is both a cause and an effect of changes in how land and energy are used.
For millennia, humans relied on warm summers, mild harvest seasons, animal manure,
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