Why do we still use concrete and asphalt for our roadways? Why have we not found a better material that is less prone to potholes and always feels smooth to drive on?
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Asphalt is pretty much unusable tar from the oil industry mixed with rocks. It doesn’t get much cheaper.
And it does a lot of things well. It doesn’t get too slippery when it rains. It’s fairly easy to work with. Easy to recycle.
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