Saturday, September 22, 2007

Other pollutions…

~Air pollution

~Land pollution

~Noise pollution

~Thermal pollution

~Light pollution

~Visual pollution

Some facts on water pollution…

~40% of America's rivers are too polluted for fishing, swimming, or aquatic life.

~Asian rivers are the most polluted in the world. They have three times as many bacteria from human waste as the global average and 20 times more lead than rivers in industrialized countries.

~Diseases caused by the ingestion of water contaminated with pathogenic bacteria, viruses, or parasites include cholera, typhoid, dysentery and other diarrheal diseases.

Effects of Water Pollution

~Waterborne Infectious Diseases

~Nutrient Pollution

~Thermal Pollution

~Noise Pollution

~Extinction of Aquatic Animals and Plants

Why does Water Pollution Occur?

Two types of water pollutants exist:
- point source
- nonpoint source. 

Point sources
-occur when harmful substances are emitted directly into a body of water. 
- eg. The Exxon Valdez oil

Nonpoint source
- delivers pollutants indirectly through environmental changes.
  - eg. fertilizer from a field is carried into a stream by rain, in the form of run-off which in turn effects aquatic life. 

Causes of Water Pollution

~Industrial Waste

~Marine Dumping

~Oil Spills

~Sewage and Wastewater

~Eutrophication

~Pesticides

~Fertilizers / Nutrient Pollution

~Mining

Introduction

Comprising over 70% of the Earth’s surface, water is undoubtedly the most precious natural resource that exists on our planet. 

Without the seemingly invaluable compound comprised of hydrogen and oxygen, life on Earth would be non-existent: it is essential for everything on our planet to grow and prosper. 

Although we as humans recognize this fact, we disregard it by polluting our rivers, lakes, and oceans.

Subsequently, we are slowly but surely harming our planet to the point where organisms are dying at a very alarming rate. 

In addition to innocent organisms dying off, our drinking water has become greatly affected as is our ability to use water for recreational purposes. 

In order to combat water pollution, we must understand the problems and become part of the solution.

About us

Superior : Christon
- Leads the group
- Represents the group

Scribe : Benedict
- Takes down minutes of meeting
- Records important points during lessons

Security : Jian Jun
- Controls group’s noise level
- Makes sure that everyone plays a part in the group

Specialists : Keith and Vernon
- Search for IT resources