By the 1970s, when the state undertook its first major natural history survey, only some 2,000 acres of Illinois - less than 0.01% of the state's landmass - remained original prairie. Illinois has also been the site of one of the 20th century's best-coordinated and most successful habitat restoration movements.
"Campus Prairie: A Community Assesses Its Landscape" (2002)
Benjamin Goluboff