Essentials of Ecology

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The environment is everything around us. It includes
all of the living and the nonliving things with which
we interact. And it includes a complex web of relationships that connect us with one another and with the
world we live in.

Despite our many scientific and technological advances, we are utterly dependent on the environment
for air, water, food, shelter, energy, and everything else
we need to stay alive and healthy. As a result, we are
part of, and not apart from, the rest of nature.

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This textbook is an introduction to environmental science, an interdisciplinary study of how humans
interact with the environment of living and nonliving