Pollution caused by human activities

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Presentation transcript:

Pollution caused by human activities BY: RIDHIMA & TANISHA

Burning of fuels such as coal, wood, kerosene, petrol and diesel produces black smoke which contains carbon monoxide and carbon dioxide. Incomplete combustion of fuels releases gases like carbon monoxide into the atmosphere. Production of smoke containing oxides of carbon by automobiles and thermal power plants. Discharge of poisonous gases such as chlorine, sulphur dioxide, oxides of nitrogen and carbon dioxide by chemical factories.

Dust produced by traffic and various industrial operations all of which add suspended particulate matter (SPM) into the air. CFCs used as coolant in the refrigerators, air conditioners and aerosol spray cans. Certain radioactive pollutants released into the air from nuclear waste.

QUESTIONS Q. Name any two fuels when burnt produce black smoke. Q. Incomplete combustion of fuels releases which gas into the atmosphere? Q. Name any three poisonous gases. Q. How is dust produced ? Q. What is CFCs ? Q. From what is radioactive pollutants released ?

Answers A. Coal and Wood A. Carbon Monoxide A. Sulphur dioxide and chlorine A. Dust is produced by traffic , mining and various industrial operations A. Chlorofluorocarbons A. From Nuclear Waste