| http://www.w3.org/ns/prov#value | - In a study by Marshall and colleagues, results ???suggest that for nitrogen oxide and other primary pollutants, low-income and nonwhite populations face a disproportionate share of the burden of urban air pollution.??? The draft National Prevention and Health Promotion Strategy released by HHS has as one of its cross-cutting strategic directions the area of Healthy Physical, Social, and Economic E
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