Isaac Asimov

Overpopulation is overlooked threat

Ron Smith is surely right when he writes, "There are now too many people to manage." ("Population, debt problems so big, they defy solutions," July 15).

But his assertion that global population is projected to increase by 50 percent by mid-century is a worst-case scenario, according to United Nations population projections.

The UN offers three projections: low, medium, and high. The 50 percent increase mentioned by Mr. Smith, which would amount to a world population of 10.5 billion by 2050 (compared with our present 7 billion), corresponds to the UN's "high" projection. Its low projection for 2050 is around 8 billion; its medium projection...