According to the graph, which activity has used the largest amount of water over the past twenty years? Bar graph showing how human beings between 1950 and 2000 used water. Between 1980 and 2000, water used for rural domestic and livestock purposes consumed less than 25 billion gallons per day. Water used for the public supply consumed between 50 and 75 billion gallons per day. Water used in thermoelectric power plants consumed between 300 billion and 350 billion gallons per day. Water used for other industrial purposes consumed approximately 50 billion gallons per day. Water used for irrigation consumed between 200 and 250 billion gallons per day.
Public Domain

Flushing toilets
Watering livestock
Watering crops
Generating electricity