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Environmental Pollution and Control
Since this book was first published in 1972, several generations of students have
become environmentally aware and conscious of their responsibilities to planet
earth. Many of these environmental pioneers are now teaching in colleges and
universities, and have students with the same sense of dedication and resolve
that they themselves brought to the discipline. In those days, it was sometimes
difficult to explain what environmental science or engineering was, and why the
development of these fields was so important to the future of the earth and to
human civilization. Today there is no question that the human species has the
capability of destroying its home and that we have taken major steps toward
doing exactly that.
And yet, while much has changed in a generation, much has not. We still
have air pollution; we still contaminate our water supplies; we still dispose of
hazardous materials improperly; we still destroy natural habitats as if no other
species mattered. And, worst of all, we still populate the earth at an alarming
rate. The need for this book, and for the college and university courses that use
it as a text, continues; it is perhaps more acute now than it was several decades ago.
Although the battle to preserve the environment is still raging, some of the
rules have changed. Now we must take into account risk to humans and be able
to manipulate concepts of risk management. With increasing population, and
fewer alternatives to waste disposal, this problem has intensified. Environmental
laws have changed and will no doubt continue to evolve. The economic cost
of preservation and environmental restoration continues to increase. Attitudes
toward the environment are often couched in what has become known as the
environmental ethic. Finally, the environmental movement has become politically
powerful, and environmentalism sometimes can be made to serve a political agenda.
In revising this book, we incorporate the evolving nature of environmental
sciences and engineering by adding chapters as necessary and eliminating material
that is less germane to today's students. We have nevertheless maintained
the essential feature of this book--the packaging of the more important aspects
of environmental engineering science and technology in an organized manner
and the presentation of this mainly technical material to a nonengineering audience.
This book has been used as a text in courses that require no prerequisites,
although a high school knowledge of chemistry is important. A knowledge of
college-level algebra is also useful, but calculus is not required for an understanding
of the technical and scientific concepts.
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