Exam 1.3 Flashcards Preview

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Flashcards in Exam 1.3 Deck (12):
1

Why is demand for resources increasing?

- population growth
- per person population demand

2

How much oil is left on earth?

1300 billion barrels of oil

3

What is the problem with overfishing?

- harvesting faster than the fish can reproduce

4

What is mariculture?

- farming of marine organisms
- mostly oysters and salmon

5

What is desalination?

- separation of pure water and sea water

6

What is the history of whaling?

- hunted since 1880s for meat, oil, bone, and baleen
- 1869 International Whaling Commisskon ban
- Japan and Norway continue whaling

7

What is marine pollution?

Introduction of a substance or energy that changes water quality or the environment

8

What causes marine pollution?

- oil discharges (oil rigs largest source)
- synthetic organic chemicals
- heavy metals (from mining)
- excessive algal growth cause by eutrophication
- plastics and solid waste

9

What is eutrophication?

Artificial enrichment of waters

10

What is biomagnification?

The concentration of toxins in an organism as a result of it ingesting plants or animals in which the toxins are more widely dispersed

11

Why is pollution costly?

- financial impacts of cleanups
- threatens marine life
- threatens food supply
- threatens public health

12

What causes the ocean to rise in acidity? What will be affected by it?

- rising CO2 emissions
- plants and animals may die from over acidic waters