ENVIRONMENTAL THREATS

Succinct presentations on a variety of
present threats to the environment, with
special emphasis on those associated with
fuel production, transportation and
consumption.

WATER, LAND and AIR POLLUTION
A cross-sectional look at how mankind is degrading the world's water, land and air. 3 programs. 75 slides and guides.
#SS-0082X SLIDES
$99.95

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SAVE OVER $49.00 ON 3 SLIDE SET BUNDLE ORDER #SS-0082X.......$99.95
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WATER POLLUTION Slides order #SS-0125S..........$49.95

Surveys factors contributing to the contamination of our water supply. Polluted
waterways are depicted with great clarity. 25 frames and guide. (Filmstrip SS-0125F
......$15.00.)

CONTENT SAMPLE: 7. Water supports plants that are the basis of all food webs.
Plants are primary producers in that they convert the sun's energy, carbon dioxide, and water
into usable food and oxygen, both of which are essential to animal life.
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LAND POLLUTION Slides order #SS-0100S.........$49.95

A dramatic look at how man has contaminated the land. Features in particular
those elements that contribute most to our polluted environment. 25 frames and guide.

CONTENT SAMPLE: 17. Highly radioactive nuclear wastes take thousands of years to
become harmless. The large scale use of nuclear power has resulted in millions of gallons of
dangerous wastes with which we do not know what to do. We can package it and put it in the
ground, but our knowledge about what the ground will do is incomplete. We may endanger many
future generations by our hasty use of nuclear fuels.
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AIR POLLUTION Slides order #SS-0080S........$49.95

Select photographs from across the nation depict contributors to our polluted air.
25 frames and guide. (Filmstrip SS-0080F........$15.00.)

CONTENT SAMPLE: 10. Energy production produces carbon particles (soot) and
gases that are belched out into our air. One of the gases, H2S, combines with oxygen in the air
forming S02, S03, and sulfuric acid, all of which cause respiratory problems.
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~1875-104~ Smoke stack emission. photo by Charles R. Belinky, Ph.D.

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