Air Pollution
NORTH SOUTH UNIVERSITY
Project on Air Pollution
BIO-103.3
Summer 2013
Prepared for: Dr. S.M. Mostafa Kamal Khan (SKK)
Introduction to Pollution:
What is Pollution?
Pollution is the introduction of contaminants into the natural environment that causes adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.
Air Pollution:
Air pollution is the introduction into the atmosphere of chemicals, particulates, and biological matter that cause harm to humans, other living organisms, or cause damage to the natural environment. Stratospheric ozone depletion (contributed to air pollution) has long been recognized as a threat to human health as well as to the Earth’s ecosystems.
Causes Of Air Pollution: | *
a) Ozone - A gas that can be found in two places. Near the ground (the troposphere), it is a major part of smog. The harmful ozone in the lower atmosphere should not be confused with the protective layer of ozone in the upper atmosphere (stratosphere), which screens out harmful ultraviolet rays.
Sources:
Ozone is not created directly, but is formed when nitrogen oxides and volatile organic compounds mix in sunlight. That is why ozone is mostly found in the summer. Nitrogen oxides come from burning gasoline, coal, or other fossil fuels.
b) Carbon monoxide - A gas that comes from the burning of fossil fuels, mostly in cars. It cannot be seen or smelled.
Sources:
Carbon monoxide is released when engines burn fossil fuels. Emissions are higher when engines are not tuned properly, and when fuel is not completely burned. Cars emit a lot of the carbon monoxide found outdoors. Furnaces and heaters in the home can emit high concentrations of carbon monoxide, too, if they are not properly maintained.
c) Nitrogen dioxide - A reddish-brown gas that comes from the burning of fossil fuels.
Project on Air Pollution
BIO-103.3
Summer 2013
Prepared for: Dr. S.M. Mostafa Kamal Khan (SKK)
Introduction to Pollution:
What is Pollution?
Pollution is the introduction of contaminants into the natural environment that causes adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.
Air Pollution:
Air pollution is the introduction into the atmosphere of chemicals, particulates, and biological matter that cause harm to humans, other living organisms, or cause damage to the natural environment. Stratospheric ozone depletion (contributed to air pollution) has long been recognized as a threat to human health as well as to the Earth’s ecosystems.
Causes Of Air Pollution: | *
a) Ozone - A gas that can be found in two places. Near the ground (the troposphere), it is a major part of smog. The harmful ozone in the lower atmosphere should not be confused with the protective layer of ozone in the upper atmosphere (stratosphere), which screens out harmful ultraviolet rays.
Sources:
Ozone is not created directly, but is formed when nitrogen oxides and volatile organic compounds mix in sunlight. That is why ozone is mostly found in the summer. Nitrogen oxides come from burning gasoline, coal, or other fossil fuels.
b) Carbon monoxide - A gas that comes from the burning of fossil fuels, mostly in cars. It cannot be seen or smelled.
Sources:
Carbon monoxide is released when engines burn fossil fuels. Emissions are higher when engines are not tuned properly, and when fuel is not completely burned. Cars emit a lot of the carbon monoxide found outdoors. Furnaces and heaters in the home can emit high concentrations of carbon monoxide, too, if they are not properly maintained.
c) Nitrogen dioxide - A reddish-brown gas that comes from the burning of fossil fuels.