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Naturally, you can't extrapolate that 12% figure for the US. And besides it doesn't seem a reasonable value at all, even for the UK. Electric engines could easily cut in half the energy needs for Transport, but even so, that would be half of a very big number. And there's also the load balancing issue.

Do you know how much oil does the UK spend on its Transport sector?

Another thing to note is that while energy efficiency can be improved with some easy in Transport, that's not exactly the case for the Industrial or Housing sectors, that have already made significant changes. There's room to improve, but how much?


Vencit omnia veritas.

by Luis de Sousa (luis[dot]a[dot]de[dot]sousa[at]gmail[dot]com) on Fri Jul 18th, 2008 at 06:47:30 AM EST
In the housing sector, there is massive room for improvement.

Of course, it would involve renouncing 17°C in the summer and 25°C in the winter. Rather the other way round.

Losing some lights at night would be a winner too.

Earth provides enough to satisfy every man's need, but not every man's greed. Gandhi

by Cyrille (cyrillev domain yahoo.fr) on Fri Jul 18th, 2008 at 06:52:21 AM EST
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From the Oil Drum article:

According to DUKES 3.4 the UK uses 38,287 thousand tonnes of oil in road transport (2005) and Miliband tells us car are responsible for 60% of road transport emissions so must use some 23 million tonnes. At 45 megajoules per kg, 23 million tonnes of oil represents 1018 joules or 288TWh. This is the primary energy, internal combustion engines are some three times less efficient than electric motors so to make sure we're not comparing apples with oranges the figure should be reduced to 96TWh. This compares with a total electricity supply of 409TWh (DUKES 5.2) and so represents 23% more electricity.

To get to Miliband's 12% we have to assume electric cars actually use less energy to deliver the same energy service (the transportation). This is actually quite feasible as the electric drive train is more efficient and the vehicle mass can be significantly reduced.

by Chris Vernon on Fri Jul 18th, 2008 at 10:26:49 AM EST
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