2. We Depend on Nature
We exchange energy and matter with our environment as we
Eat
Drink
Breathe

3. We Depend on Nature We use Energy for heat and mobility
Wood for housing and paper
Food and water for living

4. We Depend on Nature Nature Absorbs our wastes
Provides climate stability
Protects us from ultraviolet radiation

5. Ecological Footprints
The human demand on the Earth’s ecosystem is known as the ecological footprint.

6. Ecological Footprints
The amount of ecologically productive land used by individuals, cities, countries, etc.
This is compared to the amount of energy/time it takes for the Earth to regenerate the materials being used.

7. Ecological Footprint Calculation

8. 1. Land Energy – fossil fuel consumption, natural resources

9. 2. Consumed Land – built environment

10. 3. Farm Land – food production

11. 4. Forest Land – products for economy

12. 5. Transportation

13. 6. Agricultural
Open Field production of tomatoes takes up more land than greenhouse production
But Greenhouse production has a much larger ecological footprint (10-20x)
Energy
Fertilizer
Other inputs

15. Don’t write this in your notes
Weekly food shop for an average German family. $500

16. Don’t write this in your notes
USA : $346 per week

17. Don’t write this in your notes
Chad : $1.62 per week

18. THE PROBLEM: OVER CONSUMPTION POPULATION EXPLOSION
Live within your means
POPULATION EXPLOSION
Society already reducing numbers as awareness increases
Your personal choices impacts the availability of natural resources , environmental quality, and global equity!

19. Some Major Problems
Fig. 1–13a
© Brooks/Cole Publishing Company / ITP

20. More Major Problems
Fig. 1–13b
© Brooks/Cole Publishing Company / ITP

21. Still More Major Problems
Fig. 1–13c
© Brooks/Cole Publishing Company / ITP

22. Ecological Footprint Calculation
Don’t write this in your notes
Ecological Footprint Calculation
This is Mrs. Stephens’ Ecological Footprint.