Live Science: Anti-pollution measures enacted in the United States in 1970 likely led to a rebound in rainfall over the city of Atlanta in the 1970s and 1980s, new research shows. Weather stations' measurements showed that average annual rainfall in the city's core increased 10 percent after the Clean Air Act, which focuses on airborne pollutants that pose a risk to human health, passed in 1970. "It suddenly just changed dramatically in the '70s. It wasn't a gradual change. It was pretty abrupt," said Jeremy...