Our changing earth /
Canby, Thomas Y.
Our changing earth / Thomas Y. Canby. - Washington, D.C. : National Geographic Society, c1994. - 199 p. : col., ill. ; 26 cm.
Includes index.
0-87044-910-9
Environmentalism.
Environmental degradation--Citizen participation.
Ref. 363.7 C214 1994
Our changing earth / Thomas Y. Canby. - Washington, D.C. : National Geographic Society, c1994. - 199 p. : col., ill. ; 26 cm.
Includes index.
0-87044-910-9
Environmentalism.
Environmental degradation--Citizen participation.
Ref. 363.7 C214 1994