3. Objectives
define air pollution
differentiate the types of air pollutants
identify the common air pollutants
assess the effects of air pollution in
environment and health
4. Let’s get to
know the
vocabularies
Determine the word from the given
characters. Take down the words
you are able to identify to help you
understand the lesson better.
20. What is
pollutant?
Pollutant is “waste matter that
contaminates the water, air or soil.”
They are the various impurities
that have found their way into the
environment due to both human
activity and natural causes, thus
leading to pollution. These
chemical compounds are harmful
to both life and the environment.
21. What isAir
Pollution?
Air pollution refers to the __________
of __________, __________, and
__________, and __________ in the
__________ around the living spaces.
presence
chemical
dirt
particulate matter
atmosphere
pollutants
physical
biological hydrosphere
22. Types of air
pollutants
1. Primary pollutants are those gases
or particles that are pumped directly
from the source into the air to make it
unclean. They include carbon
monoxide from automobile (cars)
exhausts and sulfur dioxide from the
combustion of coal.
24. Types of air
pollutants
2. Secondary pollutants: They are not
directly emitted from the source into the
atmosphere. When pollutants in the air
mix up in a chemical reaction, they
form an even more dangerous
chemical. Photochemical smog is an
example of this, and is a secondary
pollutant.
26. What is the
difference
between
primary and
secondary
pollutants?
Based on the definitions of the types of
pollutants, complete the statements on
the next slides.
27. What is the
difference
between
primary and
secondary
pollutants?
Primary pollutant is a kind of
__________ that _______________.
Secondary pollutant is a kind of
__________ that _______________.
28. What is the
difference
between
primary and
secondary
pollutants?
Primary Pollutants and Secondary
pollutants are similar in that they are
both ___________________________,
but they are different in a way that
primary pollutants ________________,
while secondary pollutants
_________________.
30. CommonAir
Pollutants
• Ground Level Ozone (O3)
Ground level ozone is a secondary
pollutant formed by chemical reaction
of volatile organic compounds (VOCs)
and Oxides of Nitrogen (NOx) in the
presence of sunlight.
31. CommonAir
Pollutants
• Lead
Lead is produced from smelters (metal
refineries) and other metal industries;
combustion of leaded gasoline in piston
engine aircraft; waste incinerators
(waste burners), and battery
manufacturing.
32. CommonAir
Pollutants
• Nitrogen Dioxide (NO2)
Nitrogen Dioxide is produced from fuel
combustion (electric utilities, big
industrial boilers, vehicles) and wood
burning.
33. CommonAir
Pollutants
• Particulate Matter (PM)
Particulate Matter is formed through
chemical reactions, fuel combustion
(e.g., burning coal, wood, diesel),
industrial processes, farming (plowing,
field burning), and unpaved roads or
during road constructions (dust).
34. CommonAir
Pollutants
• Sulfur Dioxide (SO2)
SO2 come from fuel combustion
(especially high-sulfur coal); electric
utilities and industrial processes as well
as and natural occurrences like
volcanoes.
35. CommonAir
Pollutants
• Methane.
This is a major component of natural
gas, the gaseous form of fossil fuel. In
itself, it is harmless to the environment.
However, it is one of the greenhouse
gases, and when it reacts with carbon
dioxide in the presence of water vapor,
it absorbs and retains most of the
radiation heat from the sun.
