Earth in the balance :
Gore, Al.
Earth in the balance : ecology and the human spirit / Al Gore. - Boston, Mass. : Houghton Mifflin, 1992. - 407 p.
0395578213
Human ecology.
Environmental protection.
Environmental policy--international coperation.
Earth in the balance : ecology and the human spirit / Al Gore. - Boston, Mass. : Houghton Mifflin, 1992. - 407 p.
0395578213
Human ecology.
Environmental protection.
Environmental policy--international coperation.