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| E6 Oceans in Trouble |
| 1.1 Where are the major oceans and seas in the world? | | |
| 1.2 What is a marine ecosystem? | | |
| 1.3 What are energy flow and nutrient cycling in a marine ecosystem? | | |
| 2.1 Why are oceans important to the natural environment? | | |
| 2.2 What food resources do oceans provide for human beings? | | |
| 2.3 What energy resources do oceans provide for human beings? | | |
| 2.4 What mineral resources do oceans provide for human beings? | | |
| 2.5 What other functions do oceans have? | | |
| 3.1 What is overfishing? | | |
| 3.2 What are the impacts of overfishing on the marine ecosystem? | | |
| 3.3 What are the impacts of overfishing on society and the economy? | | |
| 3.4 What are the solutions to overfishing? | | |
| 3.5 How does Hong Kong protect its fishery resources? | | |
| 4.1 What is marine pollution? | | |
| 4.2 What are the impacts of marine pollution on the ecosystem? | | |
| 4.3 What are the impacts of marine pollution on society and the economy? | | |
| 4.4 What are the solutions to marine pollution? | | |
| 4.5 How does Hong Kong tackle marine pollution? | | |
| 4.6 Why is international cooperation important? What are the challenges met? | | |
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Aristo Science for the New Century
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