1. by: Arturo Alleje Degradation of the atmosphere’s life support sysytems.

2. The atmosphere -layer of gases that cover the earth. -protects living things from UV radiation -allowing light to reach Earth’s surface = energy for photosynthesis. - temperature regulation

3. The atmosphere and how it makes life possible Composition : Oxygen 21% - Oxygen is required for cellular respiration. Nitrogen 78% -Bacteria convert nitrogen in to air for animals and plants to use Other gases 1%- CO 2 – Animals produce CO 2 = photosynthesis for plants – Burning fossil fuels = CO 2 -- Water vapor – Varies greatly from area to area (desert or polar ice sheet to rain forest) A

4. The ozone layer -layer in the stratosphere -Ozone O 3 -The layer shields Earth from much of the harmful ultraviolet radiation. http://www.dogonews.com/ -Blocks Ultraviolet B (Harmful)

5. The greenhouse effect -trapped heat/ UV in earth that warms the earth- makes life possible -Without it life is not possible. - Bad effects if human activities interfere. jhbsdfgvsdvfsdfsdfsdfsdfsdfsdfsdf sdfsdfsdfhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhzsasddddddd dddddddddddddddddddddddddd dddddddddddddddddddddddddd dddddddddddhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhhhhhhhhhhhhhhhhhhhhhhh hhhhdddddddddddddddddddddd dddddddddddddddddddhhhhhhh hhhhhhhhhhh http://www.livescience.com/

6. Effect of human activities Over Greenhouse effect- increased pollutants in by human activities the ozone layer causing too much to be trapped heating the earth too much. Depletion of the Ozone layer. -ChloroFluoroCarbons (CFCs) main culprit -CFCs reach the upper atmosphere =exposed to ultraviolet rays = Break down of CFC. - The chlorine reacts with oxygen atoms in ozone and rips apart the ozone molecule. -1 atom of chlorine can destroy 100,000 ozone molecules - The “hole” above Antartic regions.

7. Extra UVB stops reproduction of phytoplankton affecting the whole food chain and web. http://terrabluteams.org /

8. Air pollutants and their classifications Classifications – Primary - emitted directly from the source Secondary – Formed in the atmosphere SOURCES : Natural - volcanoes, wild fires, dust storms. Anthropogenic- caused by human activities - combustion of fossil fuels - cars etc. Basic Pollutants Carbon monoxide COP Sulfur dioxodeSO 2 P OzoneO3O3 S Nitrogen DioxideNO 2 S HydrocarbonsHCP and S Lead Pb P and S human

9. Acid rain Acid precipitation-i specifically wet forms of acid pollution that’s in different types of Precipitation. Acid deposition-Acidic pollutants deposited from the atmosphere to the Earth's surface. Sulfur dioxide- -responsible for 60-70% of the acid deposition that occur. - 90% of the sulfur in the atmosphere is of human origin. http://nualgiponds.com /

10. Smog smoke x fog (clouds touching ground) = SMOG Air pollutants. www.Intelligent living.co

11. Deduction of Human health CauseSickness Ozone layer depletionSkin cancer, skin asthma, eye damage, mutations Acid rain and smogAsthma, lung cancer, bronchitis, skin irritations, eye irritaions

12. http://www.jbgrimes.myclassupdates.com/ www.kids-fun-science.com http://www.livescience.com/ http://environment.nationalgeographic.com/ www.abc.net.au http://terrabluteam http://nptel.ac.in/ http://www.physicalgeography.net/