Last year, Americans bought more than 4 billion gallons of water in individual-portion bottles. Salt Lake City mayor Rocky Anderson explains why some city leaders are encouraging their citizens to start turning to the tap.

Rocky Anderson, mayor of Salt Lake City, Utah

Bill Marsh, author of "A Battle Between the Bottle and the Faucet," published in The New York Times

Joseph Doss, president and CEO of the International Bottled Water Association

Copyright 2023 NPR. To see more, visit https://www.npr.org.