• Keeping water from becoming polluted is easier, less expensive, and safer than cleaning it once it is polluted.
  • Treating water for other purposes may not have to be as clean as drinking water.
  • The Clean Water Act regulates pollutants and provides money for wastewater treatment plants to be built.
  • The United Nations and other groups educate people in how to protect and improve their water.
  • In this video by Science Friday, inventor Adam Katzman describes how his toilet-boat converts human waste into cattails and clean water.
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