Thermal pollution

thermal pollution

1. Halala Rahman Qadir
Msc.Plant physiology
Thermal pollution

Salahaddin university
College of science
Environmental science department

2. Contents
Definition of thermal pollution
Examples of thermal pollution
Causes
Physical properties of biosphere
Factors effect on biosphere

3. Definition of biosphere
Thermal pollution is excess heat that creates
undesirable effects over long periods of time. The earth
has a natural thermal cycle, but excessive temperature
increases can be considered a rare type of pollution
with long term effects. Many types of thermal
pollution are confined to areas near their source, but
multiple sources can have wider impacts over a greater
geographic area.

4. Examples of thermal pollution
Thermal pollution is the increase of temperature caused by
human activity. A few examples of this include:
Warmer lake water from nearby manufacturing (using cool
water to cool the plant and then pump it back into the lake).
Included in thermal pollution should also be the increase in
temperatures in areas with lots of concrete or vehicles,
generally in cities.

5. Causes of thermal pollution
Thermal pollution may be caused by:
Power plants
Urban sprawl
Air pollution particulates that trap heat
Deforestation
Loss of temperature moderating water
supplies
As temperatures increase, mild climatic
changes may be observed, and wildlife
populations may be unable to recover from
swift changes.

6. Effects of thermal pollution
Environmental Effects
Decomposition of wastes occurs
faster, depleting the water of oxygen;
this affects aquatic life. Typically
affects animals

7. Thermal pollution in streams by human
activities
1. Industries and power plants use water to cool machinery
and discharge the warm water into a stream
2. Stream temperature rises when trees and tall vegetation
providing shade are cut.
3.Soil erosion caused due to construction also leads to
thermal pollution.
4.Removal of stream side vegetation
5.Poor farming Practices also lead to thermal polloution