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While the scientist may identify problems, it falls to the engineer to solve them. It is the inherent practicality of engineering, which takes into account structural, economic, environmental, and other factors that science often does not consider, that makes engineering vital to answering our most urgent concerns. Henry Petroski takes us inside the research, development, and debates surrounding the most critical challenges of our time, exploring the feasibility of biofuels, the progress of battery-operated cars, and the question of nuclear power. He gives us an in-depth investigation of the various options for renewable energy - among them solar, wind, tidal, and ethanol - explaining the benefits and risks of each. Will windmills soon populate our landscape the way they did in previous centuries? Will synthetic trees, said to be more efficient at absorbing harmful carbon dioxide than real trees, soon dot our prairies? Will we construct a sunshade in outer space to protect ourselves from dangerous rays? In many cases, the technology already exists. Whats needed is not so much invention as engineering. Just as the great achievements of centuries past - the steamship, the airplane, the moon landin - once seemed beyond reach, the solutions to the 21st century's problems await only a similar coordination of science and engineering. Eloquently reasoned and written, The Essential Engineer identifies and illuminates these problems and, above all, sets out a course for putting ideas into action. Henry Petroski (Author) Mark Deakins (Narrator)