3) In the past, American cities emptied their sewage into rivers and other bodies of water. This caused the bodies of water to be polluted and filled with microorganisms that could cause human diseases. Today, people understand how bad it is for the environment to dispose of raw sewage in rivers, lakes, and bays. How do most American cities now protect their water resources?

Question

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They flush local bodies of water every 10 years.
They send sewage to a water treatment plant.
They dispose of raw sewage in rural locations.
They only use groundwater, instead of surface water, for their drinking water supply.

Answer 1

Most American cities now protect their water resources by sending sewage to a water treatment plant. This process involves treating the sewage to remove contaminants and harmful microorganisms before it is released back into the environment, thereby reducing pollution and protecting public health.