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Date:12/12/2008

to those projected to occur in parts of Europe by 2050, according to some global change models. This study was recently published in Nature Geoscience and was conducted by the USGS, University of Colorado, University of Montana, and Slovak Academy of Sciences. For more information, visit http://www.nature.com/ngeo/journal/v1/n11/abs/ngeo339.html or contact Catherine Puckett at 352-264-3532 or cpuckett@usgs.gov.

Pavement Sealcoat Linked to U.S. Lake Contamination
Dust collected from coal-tar seal coated parking lots in central and eastern U.S. cities contains concentrations of polycyclic aromatic hydrocarbons (PAHs) that are about 1,000 times greater than levels found in western cities, where coal-tar sealcoat is less commonly used, according to a USGS study recently published in the journal Environmental Science and Technology. PAHs are an environmental concern because they are toxic to aquatic life and several are suspected carcinogens. The new study also shows that coal-tar sealcoat the shiny black material applied to many parking lots and driveways is contributing to PAH contamination in many of the nation's urban lakes. More information about PAHs, coal tar, and sealants is available at http://water.usgs.gov/nawq. You can also contact Dave Ozman at 303-202-4744 or dozman@usgs.gov.

Human Footprint in Western U.S.: Impact to Wildlife and Plants
Over the past 100 years, human actions have dramatically altered wildlands in the western United States. Human-induced changes to the landscape can result in unsuitable habitat conditions, thereby influencing the number and kinds of plants and wildlife that remain. USGS scientists developed a map of the human footprint for the western United States from an analysis of 14 features,
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Contact: Jessica Robertson
jrobertson@usgs.gov
703-648-6624
United States Geological Survey
Source:Eurekalert

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