It added 2,531 new residents in the past year, enough to register a 4.8% growth rate. And Oro Valley grew by 2.1% South of Tucson, Sahuarita posted a 3.5% year-over-year increase in population.

By 2100 the U.S. population will have increased by nearly 200 million, with a total population of some 514 million people. Given that we use water for everything, the simple math is that more ...