A Field Guide to Clean Drinking Water
Humans can only survive three days without water, and most of the world's water is not safe for drinking. What happens when a person's water supply is in danger? This frightening question is a real concern for backpackers who venture into territories with unstable water access, and increasingly even for everyday folks, given the rising rates of water insecurity and...Paperback$3199Unit price /UnavailableAvailableShips in 3-4 weeks