Nature Archives 1869 - 2009
Process Engineering, Biotechnology, Nutrition Technology
[Auszug] In the U.S., about one out of every three acres, or some 740 million acres, are forested. Preservation of America's forests has been a perpetual struggle. By the time the Europeans began settling in America in the 1500s, forestry experts estimate that no more than 40 percent of the forests were ...
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