Skill 9.6 Analyze interactions of humans with their environment

Skill 9.6 Analyze interactions of humans with their environment. 

The human population has been growing exponentially for centuries. People are living longer and healthier lives than ever before. Better health care and nutrition practices have helped in the survival of the population. 

Human activity affects parts of the nutrient cycles by removing nutrients from one part of the biosphere and adding them to another. This results in nutrient depletion in one area and nutrient excess in another. This affects water systems, crops, wildlife, and humans. 

Humans are responsible for the depletion of the ozone layer. This depletion is due to chemicals used for refrigeration and aerosols. The consequences of ozone depletion will be severe. Ozone protects the Earth from the majority of UV radiation. An increase of UV will promote skin cancer and unknown effects on wildlife and plants. 

Humans have a tremendous impact on the world s natural resources. The world s natural water supplies are affected by human use. Waterways are major sources for recreation and freight transportation. Oil and wastes from boats and cargo ships pollute the aquatic environment. The aquatic plant and animal life is affected by this contamination. 

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