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SUVs emit more climate damaging gas than older cars do, study finds
(www.theguardian.com)
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this post was submitted on 16 Oct 2023
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"doesn't have to be" but in practice they in fact are. I wouldn't call this a bias problem; it's that people are making and selling and buying huge and inefficient vehicles.
Inefficient? A modern car no matter what size is always more efficient than a small car from the 90s. Just look at the euro emission standards.
A 1985 Honda Civic got 34mpg. A modern Ford F150 gets between 14 and 25
The newer engines are a lot more efficient, but in the US (and a lot of other places) that increased efficiency has been used to move a bigger heavier vehicle, rather than to cut overall fuel use.