Got ear plugs? You may want to sport them on the subway and other mass transit, researchers say

Friday, June 19, 2009 - 08:49 in Physics & Chemistry

June 18, 2009 -- The U.S. mass transit system, the largest in the world, provides affordable and efficient transportation to more than 33 million riders each weekday. The system is generally considered one of the safest modes of travel.

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