The environment may contain dangerous levels of substances that are
harmful to human beings. Therefore, the good health of individuals requires
monitoring the soil, air, and water and taking steps to keep them safe.
| NSES Content Standard F
Science in Personal and Social Perspectives: Personal health Grades 5-8, page 168 Natural environments may contain substances (for example, radon and lead) that are harmful to human beings. Maintaining environmental health involves establishing or monitoring quality standards related to use of soil, water, and air. |