Environment

Your Water Footprint Is Bigger Than You Realize

A new calculator reminds us that every bite of food, every mile we drive, and every light switch we flip relies on the wet stuff.
REUTERS/Bernadett Szabo

Many of us are only dimly aware of how much water we use throughout the day. Last year, an Indiana University survey asked more than one thousand Americans to estimate the amount of water it takes to flush the toilet, wash clothes, and other kinds of normal household uses. On average, participants underestimated their use by a full factor of two.