RFM - I'm thinking of new high-rise construction near Chicago highways and a lot are of the sealed-envelope type where windows don't open. If they include HEPA filtering (also helpful w/COVID) the impacts would be lessened.But with pollution along highways, that's another reason to also speed up the switch to EVs, and to trucks powered via battery or fuel cell.  The pollutants from combustion would stop, though there would still be some dust created as tires and brakes wear.

RFM - I'm thinking of new high-rise construction near Chicago highways and a lot are of the sealed-envelope type where windows don't open. If they include HEPA filtering (also helpful w/COVID) the impacts would be lessened.But with pollution along highways, that's another reason to also speed up the switch to EVs, and to trucks powered via battery or fuel cell.  The pollutants from combustion would stop, though there would still be some dust created as tires and brakes wear.

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