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. 2011 Jun;119(6):A254–A257. doi: 10.1289/ehp.119-a254

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graphic file with name ehp-119-a254f2.jpg — The fourth edition of NATA includes Google Earth maps that show estimated risk levels for each census tract. Individual state maps available at http://tinyurl.com/648h4xv can be downloaded and used to identify the estimated risk averaged across the tract as well as the air toxics contributing to risk levels and their estimated contribution.