00518nam a2200157   4500008004100000020001500041050002100056100001800077245004800095260005600143300003200199500005100231650001200282650002600294650004000320150918b        xxu||||| |||| 00| 0 eng d  a0133729621  aQH 541 .B88 1997  aBush, Mark B.  aEcology Of a Changing Planet/cMark B. Bush  aUpper Saddle River (N.J.) : bPrentice Hall,c1997.  axiii, 434p.: bill.;c26cm.  aIncludes bibliographical references and Index.  aEcology  aEnvironmental Science  aNature - Effects of human beings on