1. The World Population Explosion
... the Stone Age. After more than one thousand years of formation and development, the world population reached 1 billion people in 1850. In 1950, 100 years later, the world population reached 2.5 billion people. The global population has risen annually. In 1985, the world population amounted to 5 billion, a doubling that occurred over 35 years. It was an enormous growth. Overall, the period of industrial revolution from 1965 ... to 1970, the population growth rate reached the highest ever recorded, above 1.8% per year. In the following ... ...
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