People use water resources in four main ways - for daily use, recreation, energy, and agriculture. Water is used for drinking, washing, and other daily activities by individuals, with the average person in the US using 80-100 gallons per day. Recreational uses include swimming, boating, fishing, and tourism near bodies of water. Water power is harnessed through hydroelectric dams to generate electricity, providing over 20% of the electricity in some states. Agriculture relies on water for irrigation and to meet the needs of livestock, as water is essential for growing crops and raising animals.