David Tilman,

　　a professor of ecology at the

　　University ofMinnesota, America, examined information from 100

　　countries to identify what people ate and how a diet affected

　　health. He noted a movement beginning in the 1960s. Hefound that as

　　nations

　　industrialized (工业化),

　　population

　　increased and earnings rose, more people began to adopt what

　　has been called the Western diet.

　　The Western diet is high in sugar, fat, oil and meat. By

　　eating these foods, people began to get fatter and sicker.

　　David Tilman says overweight people are at greater risk fornon­infectious diseases like diabetes (糖尿病)

　　and heartdisease.

　　Unfortunately when people become industrialized,

　　if they

　　adopt this Western diet, they are going to have these health

　　problems, especially in developing countries in Asia. China is

　　an example where the number of diabetes cases has been

　　jumping from less than one percent to 10 percent of the

　　population as they began to industrialize over a 20­year period. And that is happening all across the world, in

　　Mexico, in Nigeria and so on.

　　And, a diet bad for human beings, is also bad for the

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