english: Environmental challenges fall into the same three categories, and most of what we think about are local environmental problems: air pollution, water pollution, hazardous waste dumps. But there are also regional environmental problems, like acid rain from the Midwest to the Northeast, and from Western Europe to the Arctic, and from the Midwest out the Mississippi into the dead zone of the Gulf of Mexico.
non_english: Izazovi očuvanja životne sredine spadaju u iste tri kategorije, i većina onih o kojima razmišljamo jesu lokalni problemi životne sredine: zagađenost vazduha, vode, odlaganje opasnog otpada. Ali tu su i regionalni problemi životne sredine, poput kiselih kiša od srednjeg zapada do severoistoka, kao i sa zapadne Evrope do Arktika, te od srednjeg zapada niz Misisipi do mrtve tačke meksičkog zaliva.