1. Learning Targets “I Can …” -Give examples of the causes of atmospheric pollution and freshwater pollution. -Explain how the Industrial Revolution impacted the pollution levels of the atmosphere. -Define “greenhouse gases.” -Explain how greenhouse gases contribute to global warming. -Distinguish between point source pollution and nonpoint source pollution.

2. Pollution Contamination of Our Natural Resources

3. Freshwater Resources 1. Why do we need fresh water? a. Drinking Water, Industry, Transportation, Energy, and Waste Disposal b. Only 3% of Earth’s water is fresh water, and most of that is locked in as ice at the poles; it is essential that we protect our freshwater resources!

4. Water Pollution a. Pollutants an enter the water supply from a single source; this is called a point source pollution – Example: a factory or oil spill

5. Water Pollution b. More often, though, pollutants enter the water supply from many smaller sources; these are called nonpoint sources – Examples: grease and oil washed off streets by rain, the chemicals released into the air by factories and automobiles

6. Water Pollution c. The primary sources of water pollution are industrial and agricultural chemicals, residential sewage, and nonpoint sources – Mercury in marine fish – DDT in falcons and eagles – Nitrogen and phosphorus in human waste creates bacteria and algae blooms that rob bodies of water of oxygen

7. Water Quality and Sustainability a.The key is to protect the natural systems involved in the water cycle. b.Examples – Vegetation in wetlands and forests absorb excess nutrients and filter out some pollutants so it is important to protect these habitats – Effective sewage control – Using integrated pest management (IPM) instead of pesticides – Conservation of water itself through drip irrigation

8. Atmospheric Resources 1. Why do we need a clean atmosphere? a.OXYGEN!, Ozone layer, Greenhouse gases (Simulation) b. Pollutants in the air disrupts the natural biogeochemical cycles that keep the atmosphere clean.

9. Air Pollution Common forms include smog, acid rain, greenhouse gases, and particulates. a. Smog produces ground level ozone that affects respiratory health b. Nitrogen and sulfur compounds from factories combine with water to make acid rain; this can kill plants, change the chemistry of our soil, and dissolve mercury and other toxic elements from our soil into the biosphere

10. Air Pollution c. Excess greenhouse gases from burning fossil fuels and methane can contribute to global warming and climate changeburning climate d. Microscopic particles of ash and dust from certain industrial processes and diesel engines can be breathed in and cause serious health problems

11. Air Quality and Sustainability Automobile emissions and clean-air regulations have been set forth in some areas that have had a positive effect