|Serious acid rain problems have been caused by industrial emissions in parts of the East and Northeast of the United States, and eastern Canada, as well as Eastern Europe. Sometimes these emissions come from far away, carried on prevailing winds. And in their movements through the atmosphere they can be altered by ultraviolet light and contact with other chemical compounds.||In Germany, the name "Waldsterben" (forest death) has been given to the effects of atmospheric pollution that has killed stands of Norway spruce, fir, and European beech. The so-called "Black Triangle", an industrial area between Dresden, Germany, and Wroclaw, Poland and Prague, Czech Republic has experienced such severe acid rain that the soils can no longer grow forests.|
Pollution affects different forests in different ways. Some are so severely damaged that many or all of the trees begin to die. Some of these forests that have suffered major declines due to pollution are described here.
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