ozone slides Lesson

Introduction to Smog

●Smog: A combination of smoke and fog

●Historical context: July 26, 1943, Los Angeles incident

●Origin of the term: Early 20th century in London and Glasgow

●Los Angeles smog: Unique yellowish color and chemical odor

●Key pollutants: Volatile Organic Compounds (VOCs) and nitrogen oxides

Causes and Formation of Smog

●Volatile Organic Compounds (VOCs):

●Natural sources: Plants

●Human activities: Solvents, paints

●Nitrogen oxides: Primarily from vehicle emissions

●Photochemical reaction: Pollutants react in sunlight

●Weather factors: Calm winds, sunny conditions

●Geographical influence: Cities in basins or surrounded by mountains

●Temperature inversion: Traps polluted air near the surface

Health and Environmental Impacts

●Health risks:

●Irritation to eyes, nose, and throat

●Exacerbation of respiratory conditions (asthma, bronchitis)

●Increased risks for vulnerable populations

●Potential birth defects

●Environmental effects:

●Crop damage and reduced agricultural yields

●Increased vulnerability to pests

●Global concern: Issues in coal-reliant countries (China, Poland)

●Ozone depletion: Connection to smog-forming pollutants

●Global warming: Relationship with greenhouse gases

Solutions and Future Outlook

●Vehicle emission regulations

●Shift towards mass transit systems

●Air filtration technologies:

●Personal air purifiers

●Large-scale urban air filtration projects

●Sustainable urban planning

●Renewable energy adoption

●International cooperation on air quality standards

●Continued research on smog formation and mitigation strategies