1. Challenges for our future

2. Pollution intro  The rise of industry and the growth of world population in the past 200 years have led to a decline in a in and water quality  Since all living organisms depend upon clean air and water, pollution poses a severe threat to the survival of life on earth  The rise of industry and the growth of world population in the past 200 years have led to a decline in a in and water quality  Since all living organisms depend upon clean air and water, pollution poses a severe threat to the survival of life on earth

3. Video Presentation  http://www.youtube.com/watch?v=QIst2_0r4Gg http://www.youtube.com/watch?v=QIst2_0r4Gg  http://www.youtube.com/watch?v=QIst2_0r4Gg http://www.youtube.com/watch?v=QIst2_0r4Gg

4. Climate change  The burning of fossil fuels like coal and oil has significantly increased amounts of carbon dioxide in the atmosphere.  With increased amounts of carbon dioxide, less heat is able to escape, leading to the greenhouse effect.  The burning of fossil fuels like coal and oil has significantly increased amounts of carbon dioxide in the atmosphere.  With increased amounts of carbon dioxide, less heat is able to escape, leading to the greenhouse effect.

5. The ozone layer  Free Oxygen combines with oxygen molecules to create ozone in the earths upper atmosphere. This ozone absorbs much of the suns ultraviolet radiation.  With out the ozone layer, ultraviolet radiation would cause mutations in most living cells  Free Oxygen combines with oxygen molecules to create ozone in the earths upper atmosphere. This ozone absorbs much of the suns ultraviolet radiation.  With out the ozone layer, ultraviolet radiation would cause mutations in most living cells

6. Pesticides  Poisonous chemicals are used to control insects that threaten crops, but pesticides then become part of the water and soil, endangering other organisms  On the other hand banning pesticides would make it difficult to grow enough food for everyone  Poisonous chemicals are used to control insects that threaten crops, but pesticides then become part of the water and soil, endangering other organisms  On the other hand banning pesticides would make it difficult to grow enough food for everyone

7. Acid Rain  When fossil fuels are burned, they dump pollutants into the atmosphere. These acids get washed out of the air when it rains.  When they return in rain they are highly toxic, killing fish, destroying forests, eroding soil and further endangering the environment.  When fossil fuels are burned, they dump pollutants into the atmosphere. These acids get washed out of the air when it rains.  When they return in rain they are highly toxic, killing fish, destroying forests, eroding soil and further endangering the environment.

8. Video Presentation  http://www.youtube.com/watch?v=v-s8Y3SEAgc http://www.youtube.com/watch?v=v-s8Y3SEAgc  http://www.youtube.com/watch?v=v-s8Y3SEAgc http://www.youtube.com/watch?v=v-s8Y3SEAgc