Water is essential for life and makes up 70% of the human body. It exists in three forms - liquid, solid (ice), and gas (water vapor). Liquid water is found in oceans, lakes, rivers, and underground, while water vapor is present in the air as clouds and fog. Water is made of hydrogen and oxygen and can dissolve many substances, making it a universal solvent. Proper storage and treatment of sewage and oil spills are needed to prevent water pollution, which can spread disease and harm health. Education is important to teach people how to properly dispose of waste and keep water sources clean.