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Human Interference with the water cycle (p.499) 1. What are the three ways humans disrupt the natural water cycle?  ·  We withdraw water from the aquifers  ·  We clear vegetation from land and build roads and buildings that prevent percolation and increase runoff  ·  We interfere with the natural processes that purify water and instead add pollutants 2. What is groundwater mining and what is the danger of this process?  ·  That we run out of water because it gets to polluted or is never returned to where it came from 3. Why is it possible to run out of freshwater, a renewable resource?  ·  Because it could be to polluted to be reused or it could not make it back to where it came from Human Interference with the carbon cycle (p.501)  ·  More carbon dioxide is put into the atmosphere that is being removed. This is because burning fossil fuels. 1. How are humans increasing the amount of carbon dioxide being deposited in the atomosphere on top of "natural" sources?  ·  By burning fossil fuels. 2. What are the greenhouse gases and what are the human causes of these gases?  ·  Fertilizers and animal waste and methane. 3. Why are these gases called greenhouse gases? 4. What are some possible dangers of global warming?  ·  It gets to be summer all the time and the reindeer never come out for santa.  ·  There will also never be water. Human Interference with the Ozone Shield (p.506) 1. What is the ozone shield and what chemical reaction produces ozone?  ·  It absorbs harmful uv rays for humans and the planet 2. What are ozone holes?  ·  Severly depleted spots in the ozone 3. Why are ozone holes dangerous to humans?  ·  Because we could get burned by the uv rays and get cancer or our eyes messed up. 4. What human pollution destroys ozone molecules?  ·  Freon and Styrofoam. 5. What are commons sources of chlorine pollution?  ·  See above Human Interference and the Arctic (p. 507) 1. What does ANWR stand for and what is it?  ·  Arctic national wildlife refuge its like there TWRA 2. Why is ANWR the source of political debate? <span style="font-size: 10.0pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;"> ·  Because people want to drill on the land and they say NO! 3. What are the benefits of drilling for oil in ANWR? <span style="font-size: 10.0pt; font-family: Symbol; mso-fareast-font-family: Symbol; mso-bidi-font-family: Symbol;"> ·  Yes you get more oil 4. What are the risks of drilling for oil in ANWR? ·  You harm the enviroment.