Microorganisms amd humus have little impact on soil health

Microorganisms and humans both have a huge impact on soil health.

Microorganisms can poison the soil or they can help restore soil to a healthy state. Humans, and their use of the land (mining, recreation, pollution, etc) can have significant effects on soil health.

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what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.