00868cam a2200253 4500 289836324 TxAuBib 20170101120000.0 991222s2000||||||||||||||||||||||||eng|u 99087996 9780792275961 $40.00 0792275969 $40.00 TxAuBib Forces of change : a new view of nature / Daniel Botkin ... [et al.]. Washington, D.C. : National Geographic Society, 2000. 256 p. : ill. (some col.), maps ; 32 cm. Includes bibliographical references (p. 256). 20170101. Natural history. Human ecology. Global environmental change. Earth (Planet.) Botkin, Daniel B.