The assertion being of course that human-caused emissions of the trace gas carbon dioxide somehow have a specific effect on the Earth’s climate, which must be countered. But if everyone is forced into electric cars, the speed limit argument becomes obsolete. Lower speed limits also mean more vehicles on the road at any one time, trying to complete their journeys, which in turn could lead to more traffic delays, potentially undermining the whole idea. As usual they conflate pollution and climate arguments to cause confusion.
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Canadian cities from Edmonton to Montreal are lowering speed limits, primarily in an attempt to save lives, says CBC News.
But slowing down may also be an easy way to reduce greenhouse gas emissions and air pollution — not just on urban roadways but also on highways (and even the high seas).
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Utopia, you are standing in it! 
Aug 15, 2020 @ 22:36:11
Given the 75% reduction in transport in London in April / May for example, there should have been a concomitant reduction in pollution.
What changes in ait quality were measured?
The fact that the usual subjects are not crowing from the rooftops about how clean everything became makes me suspect the actual reductions were around the square root of f all.
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