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- Rural Health Concerns (National Library of Medicine)Around 15% of people in the United States live in rural areas. There are many different reasons why you might choose to live in a rural community. You may want ...
- Air Pollution (National Library of Medicine)... is a major part of air pollution in cities. When ozone forms air pollution, it's also called ...
- Global Health (National Library of Medicine)... country's borders. With more people living in crowded cities and traveling to other countries, it's easier for ...