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Cancer develops when cells in the body begin to grow out of control. Normal cells grow, divide, and die. But cancer cells, instead of dying, continue to
| Risk Factor | Risk |
| SOURCE: U.S. Environmental Protection Agency | |
| Excessive sun exposure | 1 in 3 |
| Cigarette smoking (one pack or more per day) | 8 in 100 |
| Natural radon in indoor air at home | 1 in 100 |
| Outside radiation | 1 in 1,000 |
| Environmental tobacco smoke (in room with a smoker) | 7 in 10,000 |
| Human-made chemicals in indoor air at home | 2 in 10,000 |
| Outdoor air in industrialized areas | 1 in 10,000 |
| Human-made chemicals in drinking water | 1 in 100,000 |
| Human-made chemicals in most foods (including pesticides) | 1 in 100,000 or less |
| Chemical exposure at uncontrolled hazardous waste sites | 1 in 10,000 to 1 in 1,000 |
grow and form new abnormal cells. Cancer cells often travel to other body parts where they grow and replace normal tissue. This process, called metastasis, occurs as the cancer cells are transported...
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This section contains 2,038 words (approx. 7 pages at 300 words per page) |
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