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How did COVID lockdowns affect air pollution?

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  • What is PM2.5 stands for ？
    Fine Particulate Matter - Airborne particles that are less than 2.5 microns across.
  • Breathing in pollutants can irritate which 2 human organs?
    throat and lungs.
  • particulate matter (PM2.5) is the name of a specific chemical.
    PM2.5 refers to all particles smaller than 2.5 microns.
  • Nitrogen dioxide （NO2）reacts with other chemicals in the air, making ________.
    ozone
  • What is pollution concentration？
    The amount of pollution in the air.
  • What happen if Ozone forms near the ground?
    cause breathing problems, and makes it hard for plants to grow.
  • What blocks harmful ultraviolet radiation in the stratosphere?
    Ozone
  • A form of energy that is emitted by the sun and artificial sources, such as tanning beds.
    Ultraviolet (UV) radiation
  • What is Lockdown？
    A government policy limiting when people could go out of their homes.
  • Air pollution only comes from human activity. True or False?
    Wrong! Air pollution only comes from human activity and natural sources.
  • Nitrogen dioxide （NO2）comes from what？
    Nitrogen dioxide (NO2) comes from cars and other machines that burn fuel.
  • Air pollution is affected by the weather.
    Ture or False
  • What is Fuel？
    Material that is burned for energy.
  • causinNitrogen dioxide （NO2）reacts with other chemicals in the air, causing ___________________ .
    causing acid rain.
  • What do we call any harmful substance in the environment?
    Pollutant
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