1. Anthropogenic Changes When human activities affect nature it's called anthropogenic

2. ‘Genesis’ = create/begin
‘Anthropo’ = human
‘Genesis’ = create/begin
Anthropogenic = human impact on the environment

3. Negative Changes  Overpopulation Urbanization Habitat Destruction
Overuse of Natural Resources
Pollution

4. Overpopulation There are over 7 Billion people on Earth.
If we keep adding more people, there will not be enough food and water for everyone.

6. Urbanization More people are starting to live in cities.
Cities are taking over area that was once open land, such as forests and prairies. Cities can grow only out or up!
Photo Source

7. Habitat Destruction
Humans can shape the environment to suit their needs.
Ex: cutting down trees, pollution, building farms and cities
Humans disturb at least 4 of the 5 Basic Needs of Animals
Oxygen, Food, Water, Shelter, Climate

8. Overuse of Natural Resources
Renewable Resource – any natural resource that can be recycled or replaced.
Wind and solar energy, wood, crops and water.

9. Overuse of Natural Resources
Nonrenewable Resource – resources that that are used up more quickly than they can be replaced by natural processes.
Fossil Fuels and metals

10. Pollution
A pollutant is anything that contaminates or harms the environment.
Air, Water, and Soil can be polluted and the effects can cause major problems lasting thousands of years.
Smog in California

11. How Long Does Trash Last?
Tin Cans: 50 years
Nylon Fabric: years
Plastic Film Container: years
Plastic Bag: years
Cigarette: 1-5 years
Wool Sock: 1-5 years
Apple Core: 2 months
Newspaper: 6 weeks
Orange or Banana Peel: 2-5 weeks
Paper Towel: 2-4 weeks
Glass Bottle: 1 million years
Monofilament Fishing Line: 600 years
Plastic Beverage Bottles: 450 years
Disposable Diapers: 450 years
Aluminum Can: years
Information Source: U.S. National Park Service; Mote Marine Lab, Sarasota, FL.
Link

12. Consequences
Greenhouse Effect – reflected sunlight heats the Earth’s surface
Without this, the Earth would be too cold to sustain life!

13. Consequences
Greenhouse gases – gases that trap sunlight in the Earth’s atmosphere
Global Warming – Greenhouse Gases are causing the Earth to heat up beyond what is considered normal level
This leads to: polar ice melting and climates throughout the world changing and becoming warmer.

14. Consequences Extinction of plants and animals
If one part of a food web disappears, it can disrupt the entire ecosystem.
We may overuse our natural resources, overuse of Renewable Resources can cause so much damage, they become nonrenewable.

15. What can we do about it? - Reuse - Recycle Alternative Energy Sources
3 R’s of Conservation
- Reduce
- Reuse
- Recycle
Alternative Energy Sources
Wind
Solar
Hydroelectric
Nuclear

16. Ozone is a form of oxygen that absorbs UV radiation from the sun
Ozone is a form of oxygen that absorbs UV radiation from the sun. If the ozone is depleted the UV rays are more intense and can cause more skin damage.
UV radiation, high energy, short wavelength, hits earth, 30% reflected back to space by sand, clouds, ice, snow
Other 70% heats oceans, land atmosphere causing thermal energy (IR) to rise which gets trapped in earth’s surface