Booklet by the Environmental Protection Agency. Covers physical effects on major body systems, as well as emotional impacts. Lengthy, but well indexed.

The forests of Western North Carolina are threatened by a wide variety of environmental stressors and disturbances, such as insects, disease, invasive species, drought, fire, hurricanes, tornadoes, and ice storms. A stressor is any kind...

This lesson describes the major components and functions of the immune system and the role of engineers in keeping the body healthy (e.g., vaccinations and antibiotics, among other things). This lesson also discusses how an astronaut's...