1. Human Impact on the Environment

2. Types of Resources
Renewable: replaced by natural processes Ex: plants/crops, water

3. Types of Resources
Nonrenewable: only available in limited amounts Ex: Metals, minerals, topsoil, fossil fuels
Fossil fuels
Coal

4. Types of Pollution Pollution: contamination of soil, water, air
Industrialization- a major source of pollution.

5. Types of Pollution Air Pollution:
Primary cause is burning of fossil fuels for electricity
Other contributors- cars, heating homes, planes
Particulates-solid particles of soot
Smog-smoke, gases, fog

6. Air Pollution Acid rain-
Sulfur oxides and water mix to form sulfuric acid that falls to earth and lowers pH of streams/lakes, leaches nutrients from the soil
pH < 5.6 is considered acidic

7. Air Pollution
Greenhouse effect- Increased Carbon Dioxide: from increased burning of fossil fuel

8. Air Pollution
Increased Carbon dioxide gases trapped in the atmosphere leads to a rise in temperature in the atmosphere called global warming.
How to reduce carbon dioxide output-
burn less fossil fuels
plant trees to absorb excess carbon dioxide

9. Air Pollution
Ozone layer- prevents lethal doses of UV radiation from reaching earth
Thinning of ozone caused by release of CFC’s (chlorofluorocarbons) into the atmosphere.

10. Types of Pollution Water Pollution:
Contaminants from sewers, industry, homes, farms
Pollutants trickle down into ground water;
More efforts being made to correct these problems

11. Water Pollution
Types
Point pollution- from a single source and easily identifiable
Example- factories

12. Water Pollution
Non-point pollution- from many sources and not easily identifiable
Example- homes, lawns, highways, pesticides, fertilizers

13. Three R’s of conservation

14. Plant and animal life http://www. youtube. com/watch
Biodiversity- the variety of life in an area
Most diverse areas of the world are tropical rainforests

15. Biodiversity is being lost due to human actions like deforestation, overhunting, overfishing, introducing a species

16. How do we negatively impact biodiversity?
Biodiversity is being lost due to human actions like:
Deforestation: clearing of trees for open land space loss of animal habitat and niches
Overhunting/overfishing interrupt predator prey relationships by influencing population dynamics
Introduced Species: when we introduce a new species that does not have a natural predator overpopulation of that new species occurs. May take over other organisms niche, habitat, food resource

17. Importance of biodiversity
Many relationships are yet to be discovered
Loss of species may have consequences for others living things (ex- food chains and food webs are disrupted)

18. Plant and Animal life
Biomagnification – as pollutants move up a food chain, their concentration increases

19. Results of Biomagnification
As the pollutant or toxin is taken into an organisms body it enter its cells
As higher order organisms obtain energy from lower order organisms, the pollutant/toxin is passed on and magnified due to the organisms usually increasing in size moving up a food chain/web.
Results in overall magnification of the toxin through the chain or web

20. The Gulf Oil Spill Disaster
Human Impact