Canby, Thomas Y. Our changing Earth / [electronic resource] / by Thomas Y. Canby ; prepared by the Book Division, National Geographic Society.. — Washington, D.C. : : The Society,, c1994.. — 199 p. : : col. ill. ; 25 cm.

Includes index.



ISBN: 0870449109 9780870449109

LCCN: 93048536

Subjects--Topical Terms:
Environmentalism.
Environmental degradation--Citizen participation.
Nature--Effect of human beings on.
Conservation of natural resources.
Proteção ambiental.

LC Class. No.: GE195 / .C36 1994

Dewey Class. No.: 363.7