1. Environmental Science
Ch. 1 Sec. 1

2. Our Env. Through Time
People constantly change the environment and have for centuries

3. Hunter-Gathers
People who obtain food by collecting plants and by hunting wild animals * Still exist in South America

4. Hunters-Gathers
Hunted bison – would burn prairies to prevent trees – easier to kill bison
Created grasslands

5. Hunters - Gathers Over hunting
Sloths, bison, mastodons,bears, and saber-toothed cats

6. Agricultural Revolution
Agriculture = is the practice of growing, breeding, and caring for plants and animals that are used for life
Hunters- Gathers started collecting seeds and domesticating animals

7. Ag Revolution
Allowed human population to grow at an unprecedented rate.
Farming land can support up to 500 times more people

8. Ag Revolution Change Food as well
Food we eat today was once wild plants
Farmers harvested the best from what they could find and planted it

9. Ag Revolution Change the Land too!
Most of the land was turned into farmland, destroying habitats
Soil loss, floods and water shortage

10. Industrial Revolution
Mid 1700s
Involved a shift from energy sources such as animal muscle and running water to fossil fuels, such as coal and oil

11. Ind. Revolution
Reduced need of human labor and land needed for farming

12. Quality of life Electricity Ag productivity increased
Sanitation, nutrition
Medical care
technology