People may live without food for two months, but would probably die in less than a week without water. Although they don't actually drink, they still need water from their food. Only distilled water has no minerals. Other bottled water has a variety of minerals and salts in them. Some of the ancient Roman aqueducts are still is use.
Fluorides do occur naturally in water.
In areas where fluoride does occur naturally, it was found that children had less cavities. This is how scientists came to realize what fluoride does, and encouraged that it be added to drinking water in areas where fluoride does not occur naturally. Approximately ten inches of snow equals one inch of water. It could easily cost between 500 and 2000 gallons of water to- produce a typical American meal. On average, it takes about 1,630,000 gallons of water to feed one American for a year.