ISEE Middle Level Reading Comprehension Quiz
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MAIN IDEA AND SUMMARY
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Read the passage, then answer the question.
In the early 1900s, many American cities grow quickly and become crowded. Streets fill with horses, carts, and new cars. Trash piles up, and dirty water often flows near homes. People get sick more easily when germs spread through unsafe water. To solve these problems, city leaders begin improving public sanitation.
One important change is building better sewer systems. Underground pipes carry waste away from neighborhoods and into treatment areas. Cities also protect drinking water by filtering it and adding small amounts of chlorine. These steps reduce dangerous bacteria that cause illness. At the same time, garbage collection becomes more organized. Workers pick up trash on regular schedules, and cities create rules about where waste goes.
These improvements do not happen overnight. They require planning, taxes, and trained engineers. However, the results are clear. Fewer people catch diseases like typhoid, and children miss fewer school days. Cleaner streets also make cities more pleasant places to live and work. Over time, public sanitation becomes a basic service that most residents expect.
City sanitation reforms show how shared systems can protect health. When communities invest in clean water and waste removal, everyone benefits.
What is the main idea of the passage?
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