1. Human Impact on the Environment

2. How do you think humans impact the environment?

3. Jot down all the notes in white, not the content in yellow.

4. Population growth leads to
Industrialization
Burning fossil fuels
Non-renewable resources
Pollution
Increased CO2 levels

5. Acid Rain
Burning of fossil fuels releases sulphates and nitrates into air
Sulphates and nitrates mix with water vapor in air and form sulphuric acid and nitric acid

6. Acidification of lakes
Lakes and ponds can become so acidified that no life can live in them!

7. Deforestation Population growth leads to the loss of natural habitats
Cut down trees to build new homes
Loss of biodiversity
Loss of oxygen producers and CO2 eliminators

8. Herbicides and Pesticides
We spray pesticides and herbicides with out knowing the consequences
DDT

9. DDT Claimed to be a miracle No effect on humans
Can build up in the environment
Biological magnification

10. Bioaccumulation
Accumulated to such levels in top predators that it started having lethal effects.
Endangered many species of birds, Including our Bald Eagles.

11. Ozone depletion
In the ’80’s it became apparent that the ozone layer was disappearing
It was confirmed that is was directly caused by human activity

12. CFC’s
Carbon-Flouro-Carbons in aerosols were leaking into the atmosphere and eating away the ozone
Freon is also a CFC

13. Pollution Water Pollution Oil Spills Gasoline spills
Gets into drinking water

14. Exxon Valdez

15. Global Warming Increase in CO2 Increase in greenhouse effect
Increase in global temperatures

17. Task:
Part a: Brain storm ways we can make a difference
Part b: Write a one page (grade 7’s write 1.5 pages) double spaced reflection explaining some of the negative impacts humans have had on the earth, then suggest ways we can make a difference to better our planet