A new study using existing trends from over the past 20 years predicted population decline in thousands of American cities over the next 80 years. Researchers at the University of Illinois Chicago used population projections to find that‚ by the year 2100‚ almost half of nearly 30‚000 cities in the US will experience a population decline. The population decline would represent 12%–23% of the population of these cities‚ the study states. The aftermath of such a decline...