Gore, Albert 1948- Earth in the balance : ecology and the human spirit / Al Gore - [S.L.] : Plume; N.Y. : Penguin Group, 1993 printing - xx,407 p. ; 21 cm ISBN: 0452269350 Subjects--Topical Terms: Environmental policy.Environmental protection.Human ecology. Dewey Class. No.: 363.7 / GOR