Environmental Pollution are defined as the “presence of impurities or pollutant substances (gases, particulate matter, radioactive substances etc) in environment that causing the harmful effect on the human, plant and animal”.
Air pollution are defined as the “presence of one or more contaminants or pollutant substances in the atmosphere that causes the harmful effect on the human health, plant & animal”.
TYPES OF AIR POLLUTION
Primary Pollutants: These are emitted directly from the point source (identifiable sources) e.g. carbon monoxide (CO), oxides of nitrogen (NOx), oxides of sulphur (SOx), Hydrocarbons, Radioactive substances etc.
Secondary Pollutants: These are formed by interaction of primary pollutants with other primary pollutants or with some constituents e.g. ozone, peroxyacetyl nitrate (PAN), photochemical smog etc.
SOURCES OF AIR POLLUTION
Burning of fossil fuels
Thermal power plants
Chemical and pesticides plants
EFFECTS OF AIR POLLUTION ON ENVIRONMENT AND HUMAN HEALTH
Ozone causes reduce pollination and yellow spot formation on the leaves thus affecting the rate of photosynthesis .
It causes the global warming , acid rain and helps in formation of photo-chemical smog .
It Causes harmful effect on the plant-
Nacrosis – killing or collapse of tissues
Chlorosis – reduction in the chlorophyll
Abscission - dropping of leaves
It causes depletion of ozone in stratosphere
It causing temperature inversion
CONTROL OF AIR POLLUTION
Minimize activities which are causes the pollution like transportation and burning of fossil fuels .
Modification of Equipments .
By using the low sulphur coal in industries .
Removing the sulphur from coal (by washing with the help of bacteria)