1. Monitoring Air Quality
78% nitrogen
21% oxygen
<1% argon
0.03% carbon dioxide
traces of hydrogen and neon
Measuring the amounts of chemicals in the air is more accurate than only estimating emissions from pollution sources, such as industrial plants.
Air quality can be determined in 2 ways:
by measuring the levels of pollutants
in the air.
-by estimating the amount of emissions
from pollution sources

2. Sulfur Dioxide
The major source of sulfur dioxide is industrial processes. In Alberta
it is caused mainly by the oil and gas industry.
Sulfur dioxide (SO2) is a major pollutant that forms both smog and
acid rain.
To reduce sulfur dioxide emissions, plants use “scrubbers”.
Scrubbers use limestone (calcium carbonate) to convert the
pollutant sulfur dioxide to a useful product, gypsum.
Sulfur dioxide can affect your respiratory system (throat and lungs) and irritate your eyes.
Reaction for sulfur dioxide and limestone reaction
2 SO2(g) + 4 H2O(l) + 2 CaCO3(s) + O2(g) CaSO4·2 H2O(s) + 2 CO2(g)
sulfur + water limestone oxygen gypsum carbon
dioxide dioxide

3. Nitrogen Oxides
Nitrogen oxides are a major pollutant that creates both smog and
acid rain from mainly the combustion in vehicles. They are also
formed by combustion in generating plants and some industrial
processes, such as oil refining.
Nitrogen forms by the burning of fuels, combines with oxygen to
produce nitrogen monoxide. The nitrogen monoxide then combines
with the oxygen in the air to produce nitrogen dioxide, the brown
smog.

4. Carbon Monoxide
The main source of carbon monoxide occurs from motor vehicles.
Other sources are wood, natural gas, airplanes, industrial processes
And even cigarette smoking.
Carbon monoxide reduces the amount of oxygen carried by the blood.
Carbon monoxide is known as the silent killer. It forms when there
is not enough oxygen in the air to complete combustion. If there is
enough oxygen, nitrogen dioxide is formed.

5. Ground – Level Ozone
Ozone is an odourless, colourless gas composed of three oxygen
atoms.
Ozone in the atmosphere protects Earth from harmful ultraviolet
radiation. Ozone near the ground is a harmful pollutant.
The major source of ground-level ozone is fuel combustion in
vehicle engines and industry. As a result, ozone pollution is a
problem mainly in larger cities.
Ground-level ozone can seriously affect crops such as wheat, soybeans, and onions. Ozone can also cause materials such as plastics to deteriorate more rapidly.

6. 2.3 Monitoring the Atmosphere
Life on Earth thrives because we live in a natural greenhouse. Some
gases in the atmosphere act like the glass in a greenhouse. They
trap heat from the Sun’s energy. This heat keeps Earth at
temperatures that allow living things to live, grow, and reproduce.
The atmospheric gases that trap heat are called greenhouse gases.
Water vapour
Carbon dioxide
Methane
Nitrogen oxides are all greenhouse gases.

8. "Al Gore is coming out with a movie about global warming called 'An Inconvenient Truth.' It's described as a detailed scientific view of global warming. President Bush said he just saw a film about global warming, 'Ice Age 2; The Meltdown.' He said, 'It's so much better than that boring Al Gore movie.'" --Jay Leno
"Al Gore’s movie about global warming is called 'An Inconvenient Truth.' It's described as a detailed scientific view of global warming. President Bush said he just saw a film about global warming, 'Ice Age 2; The Meltdown.' He said, 'It's so much better than that boring Al Gore movie.'" --Jay Leno
"President Bush said global warming is happening much quicker than he thought, and then his staff pulled him aside and said 'It's just springtime.'" --Jay Leno

9. Enhanced Greenhouse Effect: greenhouse effect made greater by
human activities, such as burning fossil fuels and clearing land, that
add greenhouse gases to the atmosphere.
Global Warming: increased average temperatures worldwide caused
by the enhanced greenhouse effect.
To slow down global warming countries have started to reduce carbon dioxide emissions through various means. They have also started to plant trees to offset the company’s carbon dioxide production.
Greenhouse effect happens naturally, enhanced happens with our help.

10. The ozone layer provides Earth with protection from the Sun’s
damaging ultraviolet rays. Exposure to greater UV rays could
cause cancer, cataracts and plankton deaths.
Chlorofluorocarbons have caused the thinning of our ozone layer.
They are used in refrigerators, aerosol cans and fire extinguishers.