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The Hydrosphere

Pollution and Degradation

Effects of Polluted Waters

Living Organisms

- accumulation of contaminants

- decreased quality of drinking water

- harm species

- Can degrade some contaminants

- Maintain ecosystem balance

UNLESS:

- Too many pollutants

- Pollutants are extremely toxic

Eutrophication

Point Sources

vs

Non-Point Sources

Definition: the process by which natural waters lose their oxygen because of an excessive accumulation of organic matter and nutrients

Point Source: known origin of pollution

Non-Point Source: spread pollution, hard

to locate exact location

Thermal Pollution

Effect of human activities

- Added warm water raises overall

water temperature

- Reduces oxygen concentration

of water

- Harms fish etc

Threats at Sea

- Endanger the quality of drinking water

- Damage ecosystems

- Reduce the natural beauty of landscapes

~ 6 million tonnes of petroleum dumped into ocean each year

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