1. 22-2: ENVIRONMENTAL ISSUESPP

2. Pollution
Putting substances that cause unintended harm into the air, soil, water, or noise

3. GREENHOUSE AFFECT the ability to trap heat
keeps our planet warm and habitable

4. GLOBAL WARMING Excess CO2 released from burning of fossil fuels
Possible correlation between temperature and CO2 levels
Adds to the “greenhouse” to trapping heat
Estimated that earth’s average temp with increase by 2 degrees in the next 100 years.

7. Ocean Acidification
CO2 dissolve rate increases with increasing temperature
carbon dioxide (CO2) reacts with bicarbonate (H2CO3) to produce carbonic acid (HCO−) and carbonate (CO2−) and H+
Leads to acidification

8. Video

9. HOLE IN THE OZONE LAYER O3 (ozone) blocks radiation
CFCs (chlorofluorocarbons) from refrigerators and propellants break down ozone
Localized in southern hemisphere and increased in size over time

10. ACID RAIN
Burning of coal produces H2SO4 (sulfuric acid) and burning of gasoline produces HNO3 (nitric acid)

11. ACID RAIN
These pollutants enter the atmosphere to form acidic water (acid rain)
Changing pH causes diseases or death in trees, fish, and other organisms.

12. LAND AND WATER POLLUTION
Bioaccumulation: pollutant from the environment enters the food chain through the lowest level
Biomagnification: increase in concentration of a pollutant moving up the food chain

13. Video

14. ECOSYSTEM DESTRUCTION
Extinction due to imbalances
removing keystone species
habitat destruction (logging, damming rivers, draining swamps)

15. ECOSYSTEM DESTRUCTION
Extinction due to imbalances
Over hunting/fishing
Introduction of invasive non-native species
Most dominant cause of the reduction in biodiversity

16. Earth’s history shows times of mass extinctions
ARROWS INDICATE MASS EXTINCTION
Earth’s history shows times of mass extinctions
estimated by 2030, 20% of species will be gone