This document discusses air pollution sources and prevention methods. It defines air pollution as the presence of substances generated by human activities in concentrations that interfere with health, safety, or comfort. Primary pollutants are emitted directly from sources like factories, while secondary pollutants form through chemical reactions involving primary pollutants. Major sources include automobiles, industries, domestic activities, and tobacco smoke. Prevention methods center around containment of pollutants, replacing polluting processes, dilution through green belts, and legislation like Clean Air Acts.
2. • AIR POLLUTION SIGNIFYIES THE PRESENCE IN
THE AMBIENT(SURROUNDING ATMOSPHERE
OF SUBSTANCES(GASES, MIXTURE OF GASES
AND PARTICULATED MATTER) GENERATED BY
THE ACTIVITIES OF MAN IN CONCENTARTIONS
THAT INTERFERE IN HUMAN HEALTH, SAFETY
OR COMFORT.
4. • PRIMARY AIR POLLUTANT- EMITTED TO THE
ATMOSPHERE FROM A SOURCE SUCH AS
FACTORY CHIMNEY, EXHAUST PIPE, THROUGH
SUSPENSION OF CONTAMINATED DUSTS BY
WIND.
• SECONDARY AIR POLLUTANT-FORMED WITHIN
ATMOSPHERE ITSELF, FROM CHEMICAL
REACTIONS THAT INVOLVE PRIMARY
POLLUTANTS.
5.
6. • AUTOMOBILES-
HYDROCARBONS,CO,LEAD.NITROGENOXIDES AND
PARTICULATE MATTER.
• INDUSTRIES-COMBUSTION OF FUEL GENERATES
SULPHUR DIOXIDE, NITROGEN OXIDES AND FLY
ASH.PETROCHEMICAL INDUSTRIES GENERATE
HYDROGEN FLURIDE, HYDRO CHLORIC ACID AND
ORGANIC HALIDES.
• DOMESTIC SOURCES-COMBUSTION OF COAL, WOOD
AND OIL.
• TOBACCO SMOKE.
• MISCELLANEOUS.
7.
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19. PREVENTION AND CONTROL
• CONTAINMENT-prevention of escape. (enclosure,
ventilation, air cleaning)
• REPLACEMENT-of technological process causing
air pollution (MECHANICAL COLLECTORS,
ELECTROSTATIC PRECIPITATORS,scrubbers AND
ETC.)
• DILUTION-establishment of green belts
• LEGISLATION-CLEAN AIR ACTS, “THE AIR(
PREVENTION AND CONTROL OF POLLUTION ) ACT
1981.
