Biodiversity Heritage Library
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Subject "Effects of human beings on"
Critical trends in Illinois ecosystems /
By: Critical Trends Assessment Program. - Illinois. - Illinois.
Publication info: Springfield, Ill. :Illinois Natural History Survey,2001.
Contributed by: University of Illinois Urbana Champaign
Subjects: Conservation of natural resources Ecological assessment (Biology) Effects of human beings on Environmental impact analysis Environmental quality Illinois Nature Pollution