Union Pacific Railroad polluted tributaries of Lake Mead and the Colorado River by dumping stuff into Clover Creek and Meadow Valley Wash, the USA claims in Las Vegas Federal Court.

     Public Service Company of Colorado dba Xcel Energy pollutes the air, the Wildearth Guardians claim in Denver Federal Court.
     Lehigh Cement Co. pollutes the air with particulates, Maryland claims in Baltimore City Court.

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