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Hum. Since I am a physicist, let's talk about physics.

Let us assume that we keep the same cars than we have today in terms of weight, equipment and speed. Now, they emit, for the most recent ones, 140 g/km. The current yield (if this is the term) of thermic motors is about 30%. Having a 70g/km emission means to reach a 67% yield of thermic motors, which has never been done before (specialists consider that 30% is the maximum for now and maybe for a long long time).

This is not very realistic. And anyway, this means that with the cars we have, a 47 g/km emission is a minimum given by the laws of physics.

by Renard (scio at free point fr) on Thu Sep 13th, 2007 at 08:38:22 AM EST

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