AIR POLLUTION By, S.Akhila Swetha, Roll no:51, 4rth BDS.

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Presentation transcript:

AIR POLLUTION By, S.Akhila Swetha, Roll no:51, 4rth BDS.

Index: Definition Types of air pollution Causes and effects of air pollution Sources of air pollution Effects of air pollution Prevention of air pollution

Definition: It is a broad term applied to all the physical, chemical, and biological agents that may modify the natural characteristics of the atmosphere and the environment.

Types of air pollutants: Primary air pollutant Ex: CO Secondary air pollutant Ex:formation of ozone in photochemical smog

Causes and effects air pollution Acid rain Black carbon pollution. Particulate pollution. air pollution Outdoor air pollution Ozone depletion Indoor air pollution Greenhouse effect

Out door pollution

mechanism of air pollution due to smog:

Temperature inversion: Black carbon pollution

Acid rain:

Ozone depletion Chlorofluorocarbons Ozone layer in Stratosphere effected

Indoor air pollution

Pollution sources: Anthropogenic sources Other anthropogenic sources Natural sources Contaminants

Anthropological sources: combustion-fired powered plants Vehicles with internal combustion engine Devices powered by two-stroke cycle engines Stoves and incinerators especially coal ones. Wood fires burning inefficiently. Farmers burning crop waste.

Other anthropological sources: Aerosol sprays and refrigeration. Dust and chemicals. Military actions like testing of nuclear bombs,poisonous gases, germ warfare. Waste deposition in landfills,which generate methane.

Natural sources: Dust from natural sources. Methane emitted from decomposition of animals and cattle. Smoke and carbon monoxide from wildfires. Volcanic activity, producing chlorine,sulphur,and ash particulates.

Contaminants: Carbon monoxide. Chlorofluorocarbons. Hydrocarbons. Lead and heavy metals. Nitrogen oxides. Sulphur dioxide.

Mercury toxicity alginate DENTISTRY Acrylic aerosols

Effects of air pollution on health: Short term effects: Irritation to the eyes,nose and throat. Upper respiratory infections. Headache,nausea,and allergic reactions. Asthma and emphysema

Long term effects: Chronic respiratory diseases. Lung cancer. Heart diseases. Damage to the brain,nerves,liver or kidneys.

Prevention of damaging effects of air pollution: Assessments Pollution emission for transportation vehicles and industry Restricting smoking Adequate ventilation

Prevention

References: Text book of preventive and community dentistry S.S.Hiremath. Text book of preventive and social medicine- park and park. www.google.com.

THANK YOU