Acid rain describes any form of precipitation that contains high levels of nitric and sulfuric acids. It can also occur in the form of snow, fog, and tiny bits of dry material that settle to Earth.

NORFOLK, Va. — As we dive into the cooler months, there's always that chance we can see rain, snow, sleet or even freezing rain as the days start to get colder. But there's a reason why we could end ...