All Flashcards
What causes air pollution?
Primarily the burning of fossil fuels (combustion) which releases byproducts and impurities into the air.
Why are cities in valleys prone to thermal inversions?
Valleys trap cool air, allowing a layer of warm air to settle above, trapping pollutants.
Why is indoor air pollution a concern?
People spend significant time indoors, and poor ventilation can trap harmful contaminants.
How does sunlight contribute to smog formation?
Sunlight provides the energy for NOx and VOCs to react and form tropospheric ozone, a major smog component.
What makes tropospheric ozone a secondary pollutant?
It's formed by the interaction of primary pollutants (NOx, VOCs) with sunlight.
Explain the role of nitrogen oxides in smog formation.
Nitrogen oxides (NOx) react with volatile organic compounds (VOCs) in the presence of sunlight to form photochemical smog.
What is the impact of thermal inversion on air quality?
It traps polluted air, leading to prolonged periods of poor air quality and increased health risks.
Why are older buildings more likely to have asbestos?
Asbestos was commonly used as a building material in the past due to its fire-resistant properties.
How does public transportation reduce air pollution?
By reducing the number of individual car trips, it lowers overall emissions from vehicles.
What is the relationship between combustion and air pollution?
Combustion, especially of fossil fuels, releases pollutants like CO, NO2, SO2, and particulate matter into the atmosphere.
What is the effect of thermal inversion on air pollution?
It traps pollutants near the ground, leading to increased concentrations and poor air quality.
What is the effect of burning fossil fuels?
Releases primary air pollutants like CO, NO2, SO2, and particulate matter.
What is the cause of photochemical smog?
Reaction of nitrogen oxides and volatile organic compounds with sunlight.
What causes indoor air pollution?
Furniture, cleaning products, mold, radon, asbestos, and tobacco smoke.
What are the consequences of poor ventilation indoors?
Traps indoor air pollutants, leading to higher concentrations and health risks.
What is the effect of the Montreal Protocol?
Phases out CFCs, leading to a reduction in ozone depletion.
What is the effect of stricter emission standards?
Reduces the amount of pollutants released from vehicles and industrial sources.
What is the main cause of air pollution?
Combustion, which releases byproducts and impurities into the air.
Why are cities in valleys prone to thermal inversions?
Valleys trap cool air, allowing warm air to sit on top and trap pollutants.
Why is indoor air pollution often worse than outdoor?
Poor ventilation traps contaminants, and we spend a lot of time indoors.
What role does sunlight play in smog formation?
Sunlight provides the energy for nitrogen oxides and hydrocarbons to react and form smog.
What is the significance of the Clean Air Act?
It sets emission standards for cars and limits pollutant release.
How does transitioning to renewable energy reduce air pollution?
It reduces the burning of fossil fuels, which are a major source of air pollutants.
Describe the relationship between NOx and ozone.
NOx reacts with hydrocarbons in the presence of sunlight to form tropospheric ozone, a component of smog.
How does fuel efficiency reduce air pollution?
More fuel-efficient vehicles burn less fuel, releasing fewer pollutants.
Explain the impact of thermal inversions on air quality.
Thermal inversions trap pollutants, leading to prolonged periods of poor air quality.
What makes tropospheric ozone a secondary pollutant?
It is formed by the reaction of primary pollutants (NOx and VOCs) in the atmosphere.