Ecological Concerns Topic *1012 *1014 *1017 *1093 Ms. Morris Acid Rain Rain with a pH less than 5.6 Pollutant gasses react with moisture More of a problem in eastern US – Why? Wind Movement!!! The weather starts collecting particles on the west side of the US, and deposits them on the east side!! Ozone Depletion Caused by UV (ultraviolet) light breaking a chlorofluorocarbon (CFC) bond Ozone is 731 miles above the earth Ozone depletion causes an increase in the amount of UV rays reaching the surface Ozone Depletion Global Warming Carbon dioxide (CO2) and other greenhouse gasses trap in sun light and warms the Earth Ideally All or most of the suns rays would reflect off the earth and leave the atmosphere Actually The layer of greenhouse gasses trap sunlight in, heating the Earth Species Loss & Habitat Destruction Remember the food web? What would happen if we took just one species out? Species Loss & Habitat Destruction Removing one species from the food web: – Decreases genetic diversity – Some surviving species become threatened or endangered Rainforests and Wetlands These are the most beneficial biomes – Wetlands help control flooding – Both support lots of life forms LARGE species diversity of all life forms in both areas Wetlands are being industrialized Rainforests are being cut down Wetlands in Yellowstone Image: www.ucmp.berkeley.edu Questions Explain what pH has to do with acid rain. Why is acid rain a bigger problem in the eastern US? What are CFC’s, and why should we be worried about them? Turn this in to Ms. Morris by the end of the class (10 points).