What are the Threats to the Worlds Oceans

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Presentation transcript:

What are the Threats to the Worlds Oceans IB Geography Piers Tainsh

Describe the pattern of human influence on the worlds oceans. Explain the pattern.

What are the Sources of Pollution? Many but they include Dredging of harbours brings sunk heavy metals and petrochemicals to the surface Sewage Industrial waste and radioactive waste Farming waste – nitrates and phosphates Oil run off from roads (60m litres alone from USA)

Describe the sources of and potential effects of different types of waste

What are the Effects of Oil? At all levels of production, transportation and use it can pollute oceans.

Nuclear waste drums dumped onto greenpeace boat.

Dead Zones and Red Tides

Different causes of dead zones Which is natural and which anthropogenic? http://youtu.be/yh5Ev8VEbZ0 - http://www.youtube.com/watch?v=UZgcQoXmu9Y