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: Okoljske izzive lahko razdelimo v iste tri kategorije, in največ o čemer razmišljamo, so lokalni okoljski problemi: onesnaženje zraka, onesnaženje vode, odlaganje nevarnih odpadkov. Toda tu so tudi regionalni okoljski problemi, kot je kisel dež, od Srednjega zahoda do severovzhoda ZDA in od zahodne Evrope do Arktike, ter od sredjegazahoda ZDA iz Missisipija v mrtvo cono Mehiškega zaliva.