Provided by the Center for Disease Control's (CDC), National Institute for Occupational Safety and Health (NIOSH), this historic 1943 image depicted a North Carolina railyard, and a train emitting billowing black smoke from its engine. Today, such pollutants are more stringently regulated through the implementation of technologic advancements, thereby, reducing the toxification of the environment on a global scale.
CDC/ Barbara Jenkins, NIOSH
November 4, 2012
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