1. Ocean Pollution How Pollutants Get into the Oceans
Preventing Ocean Pollution
Who owns the Oceans?
March 3, 2009
Sanders

2. Homework Questions Where does most pollution ocean come from?
What kind of pollution is it?
What are the three sources of oil pollution in the ocean?
Why is plastic considered to be a pollutant?
What are its sources?

3. Ocean Pollution Styrofoam cups Plastic Bottles Plastic bags
November 13, 2018
Sanders

4. How Pollutants Get into Oceans
85% of the ocean pollution comes from land.
Materials dumped into rivers and streams pour into oceans as runoff.
Polluted water
November 13, 2018
Sanders

5. November 13, 2018
Sanders

6. Directly Dumped into the Ocean
Sludge from sewage treatment plants get dumped directly into oceans.
Oceangoing vessels dump wastewater and garbage directly into ocean.
November 13, 2018
Sanders

7. Accidental Spills of Oil
Oil spills also contaminate the ocean.
Account for 5% of spills
Oil spills also occur not only from large tankers
small oil leaks in ships
oil rigs.
November 13, 2018
Sanders

8. Biologic Effects of Oil Spills
Oil spills destroy plants in the ocean
Poison the animals
Birds coated in oil cannot fly.
Animals ingest oil through bioamplification.
November 13, 2018
Sanders

9. Plastics Plastics do not readily degrade.
Animals eat plastics and starve.
At right is a baby albatross that died from eating plastic.
November 13, 2018
Sanders

10. Seals November 13, 2018 Sanders
this seal is 15 or 16 years old, he was rescued as a baby, he had a plastic ring that holds six packs of soda around his neck
November 13, 2018
Sanders

11. MARPOL
International Convention for the Prevention of Pollution from Ships.
Prohibits discharge of oil form ships
Prohibits discharge of garbage
Open Ocean
Coastal Waters
November 13, 2018
Sanders

12. 1974 Helsinki Convention
120 nations seeks to control land-based sources of ocean pollution
Toxic dumping
Runoff
Toxic Chemicals
DDT
Cadmium
Mercury
November 13, 2018
Sanders

13. Who Owns the Oceans? Open Ocean is open to everybody.
Law of the Seas Treaty states that the laws of a coastal nation extend 22 km or 12 nautical miles
This is the nation’s economic zone.
Nation has control over
economic activity
environmental protection
research
November 13, 2018
Sanders