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A local farmer uses chemical fertilizers in his farm. The runoff from the farm pollutes a river which supplies drinking water in the location. This causes serious health problems among people in the location. Which of these is the best method to solve this problem?

  • Ask the farmer to stop fertilizing the farm.
  • Ask the farmer to use compost to fertilize the farm.
  • Ask people to migrate to locations away from the river.
  • Ask people in the location to use the river water only for washing purposes

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