Acclaimed author and journalist Michael Pollan argues that what most Americans are consuming today is not food but "edible foodlike substances." His previous book, The Omnivore's Dilemma: A Natural History of Four Meals, was named one of 2006's ten best books by the New York Times and the Washington Post. His latest book is called In Defense of Food: An Eater's Manifesto. This is part 1 of 4.
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