Three different motivations drive today’s energy discussions.
First, fossil fuels are a ﬁnite resource. It seems possible that cheap oil
(on which our cars and lorries run) and cheap gas (with which we heat
many of our buildings) will run out in our lifetime. So we seek alternative
energy sources. Indeed given that fossil fuels are a valuable resource, use-
ful for manufacture of plastics and all sorts of other creative stuff, perhaps
we should save them for better uses than simply setting ﬁre to them.
Second, we’re interested in security of energy supply. Even if fossil
fuels are still available somewhere in the world, perhaps we don’t want to
depend on them if that would make our economy vulnerable to the whims
of untrustworthy foreigners. (I hope you can hear my tongue in my cheek.)
Going by ﬁgure 1.2, it certainly looks as if “our” fossil fuels have peaked.
The UK has a particular security-of-supply problem looming, known as the
“energy gap.” A substantial number of old coal power stations and nuclear
power stations will be closing down during the next decade (ﬁgure 1.3),
so there is a risk that electricity demand will sometimes exceed electricity
supply, if adequate plans are not implemented.
Third, it’s very probable that using fossil fuels changes the climate.
Climate change is blamed on several human activities, but the biggest con-
tributor to climate change is the increase in greenhouse effect produced by
carbon dioxide (CO2). Most of the carbon dioxide emissions come from
fossil-fuel burning. And the main reason we burn fossil fuels is for energy.
So to ﬁx climate change, we need to sort out a new way of getting energy.
The climate problem is mostly an energy problem.
Whichever of these three concerns motivates you, we need energy num-
bers, and policies that add up.
The ﬁrst two concerns are straightforward selﬁsh motivations for dras-
tically reducing fossil fuel use. The third concern, climate change, is a more
altruistic motivation – the brunt of climate change will be borne not by us
but by future generations over many hundreds of years. Some people feel
that climate change is not their responsibility. They say things like “What’s
the point in my doing anything? China’s out of control!” So I’m going to
discuss climate change a bit more now, because while writing this book I
learned some interesting facts that shed light on these ethical questions. If
you have no interest in climate change, feel free to fast-forward to the next
section on page 16.
The climate-change motivation is argued in three steps: one: human fossil-
fuel burning causes carbon dioxide concentrations to rise; two: carbon
dioxide is a greenhouse gas; three: increasing the greenhouse effect in-
creases average global temperatures (and has many other effects).