14. OZONE
LAYER
3. UNLIMITED
RESOURCES
16. CARBON
FOOTPRINT
18. CLIMATE
CHANGE
6. URBAN
SPRAWL
11. WASTE
DISPOSAL
19. AIR
POLLUTION
10. ENDANGERED
SPECIES/ANIMALS
1. SOLAR
PANEL
12. MEAT
CONSUMPTION
8. ACID
RAIN
5. GREENHOUSE
EFFECT
4. SUSTAINABLE
ENERGY/AGRICULTURE
13. ENVIRONMENTALLY
FRIENDLY
9. NATURAL
DISASTER/RESOURCES
20. HYBRID
CAR
7. ORGANIC
FOOD/PRODUCTS/VEGETABLES
15. INDUSTRIAL
WASTE
2. TOXIC/EXHAUST
FUMES
17. GLOBAL
WARMING