pollution

Ministry of education

Dakhliya Covernorate

Ras al-jabel BE (1-12)

name:

Write your name

here

Teacher:

Teacher name

Thermal pollution is caused by

• Either dumping hot water from factories/ power plants
• Removing trees and vegetation that shade streams, permitting sunlight to raise the temperature of these waters.

​

Thermal pollution

Electric power plants

​

Factories.

​

Decay of organic matter

​

Heating room

​

Major sources of thermal pollution

Electric power plants

To condense the steam, cool water is brought into the plant and circulated next to the hot steam. In this process, the water used for cooling warms 5 to 10 Celsius degrees (9 to 18 Fahrenheit ), after which it may be dumped back into the lake, river, or ocean from which it came.

​

​

The second type of thermal pollution is much more widespread. Streams and small lakes are naturally kept cool by trees and other tall plants that block sunlight.

​

People often remove this shading vegetation in order to harvest the wood in the trees, to make room for crops, or to construct buildings, roads, and other structures.

​

Left unshaded, the water warms by as much as 10 Celsius degrees (18 Fahrenheit).