The title is the question.
Maybe it’s the cheapest thing with the right properties, but can’t it be painted with something a little more reflective, that won’t absorbe so much heat from the sun?
In: Technology
Bitumen is a byproduct from the oil refinery process. It’s produced in huge amounts and the easiest way to get rid of it was to mix it with gravel, name it “asphalt” pour it over all the bumpy roads. It has to be cheap, because of the incredible amount of roads. White pigments would cost a lot and blind the drivers.
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