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MoDOT to test smog-absorbing concrete on St. Louis roadway

Friday, October 7, 2011 | 7:35 a.m. CDT; updated 10:01 a.m. CDT, Friday, October 7, 2011

ST. LOUIS — Missouri transportation officials plan to use a St. Louis roadway to test a new type of concrete that can absorb smog.

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