Managing Our Natural Resources, 6e, Camp - 27

CHAPtER 3

Concepts in Natural Resources Management

27

Ā© Cengage LearningĀ®

FIguRE 3-1 taughannock Falls

Little that we do will affect the total amount of water that comes to earth in the
form of precipitation.
On the other hand, water supplies may be very limited in certain locations.
Chapter 13 deals with our water supply and its users. At the beginning of that
chapter the hydrologic cycle is explained. It is because of this cycle that water is a
nonexhaustible resource. Chapter 14 points out the problems we face in damaging our water supply by pollution. Nevertheless, our water supply is nonexhaustible, for all practical purposes (Figure 3-1).
Another example of a nonexhaustible resource is air. We use air to breathe,
to grow plants, to fly airplanes, to power windmills, and to dry food and clothes.
We can damage the air with pollution. We could even make it unusable, as many
environmentalists would argue, but we cannot "use it up," given our current
technology. It is nonexhaustible, for all practical purposes.

Renewable Resources
Natural resources that reproduce themselves or that can be reproduced by human
efforts are considered renewable. Simply because a resource is renewable does
not mean it will never be used up. On the other hand, it is possible to use such
resources and yet have as much left afterward as before that use.
Consider forests. (Chapter 19 discusses forests and forest products.) We use
more wood today than ever before, and still we produce more wood each year
than we use in this country. The types of wood have changed; we no longer
harvest as many large hardwoods as we once did. Yet we have no foreseeable
shortage of wood or wood products in the United States. This is true because of
the advances made in forestry, both in woodland management and in genetics.
And it is true because trees are a renewable natural resource.
Another example of renewable resources is our fish and wildlife population.
In our nation's past, there have been times of great waste. Like all wildlife, passenger pigeons were renewable-but they were exhaustible. Millions of passenger
pigeons were killed, and the popular food bird became extinct. Great herds of

(pronounced tuh-GaN-uck) is
located near Ithaca, New York.
at 215 feet, taughannock is
taller than Niagara Falls and
the tallest free-falling waterfall
in the northeastern United
States.



Table of Contents for the Digital Edition of Managing Our Natural Resources, 6e, Camp

Contents
Managing Our Natural Resources, 6e, Camp - Cover1
Managing Our Natural Resources, 6e, Camp - Cover2
Managing Our Natural Resources, 6e, Camp - i
Managing Our Natural Resources, 6e, Camp - ii
Managing Our Natural Resources, 6e, Camp - iii
Managing Our Natural Resources, 6e, Camp - iv
Managing Our Natural Resources, 6e, Camp - v
Managing Our Natural Resources, 6e, Camp - Contents
Managing Our Natural Resources, 6e, Camp - vii
Managing Our Natural Resources, 6e, Camp - viii
Managing Our Natural Resources, 6e, Camp - ix
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Managing Our Natural Resources, 6e, Camp - Cover4
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