Many of today's respected thinkers argue that our efforts to fight climate change and other environmental perils will all fail unless "we do something" about population growth. One recently declared that, "in the last 200 years, population growth has been exponential. The world population doubles every forty years," ( A ) For a start, there is no exponential growth. In fact, population growth is slowing. For more than three decades now, the average number of babies being born to women in most of the world has been in decline. Globally, women today have half as many babies as their mothers did, mostly out of choice. They are doing it largely for their own good and the good of their families, not because it helps the planet. Here are the numbers. Forty years ago, the average woman had between five and six kids. Now she has 2.6. This is getting close to the replacement level, which, allowing for girls who don't make it to adulthood, is around 2.3. Half ...
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