Earth : portrait of a planet / Marshak, Stephen, 1955- author.

considers the growing environmental impact of human activity on planet Earth"--

and cotrol -- Energy and change -- Planet earth and beyond -- Systems and control.

systems and control -- Planet earth and beyond and systems and control.

things -- Planet earth and beyond and systems and control. Planet earth -- The surface of the earth

insulators -- Systems to solve problems -- Mains electricity -- Planet earth and beyond and systems and

and change -- Systems and control -- Matter and materials -- Planet earth and beyond -- Systems and

and change -- Systems and control -- Planet earth and beyond.

. Our planet Earth -- 12. Weather and our environment.