By James A. Haught, Tribune News Service (TNS) When I was born in 1932, the world had 2 billion people. Today, the population is 7.7 billion and is likely to hit 11.2 billion by the end of the century, the United Nations reports. How can the planet feed the surging swarm? Here are some thoughts: I grew up in a meager farming region of West Virginia. We had no electricity. Small-town families had gaslights,