. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. fj Southern unglaciated 0 South Central â¡ Western 0 Grand Prairie I Northern 7ZZ, z \ffââf\ *,fââf\ W, S / / f "~~~ 'â mm V>*/>/A 1820 1924 1948 1962 1985 Year Figure 3. Changes in forest area by region, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations

---

. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. fj Southern unglaciated 0 South Central â¡ Western 0 Grand Prairie I Northern 7ZZ, z \ffââf\ *,fââf\ W, S / / f "~~~ 'â mm V>*/>/A 1820 1924 1948 1962 1985 Year Figure 3. Changes in forest area by region, Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Dept. of Energy and Natural Resources; Critical Trends Assessment Project. Springfield, Ill. : Ill. Dept. of Energy and Natural Resources

---

Size: 1194px × 2092px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman