Practice Test | Kullabs.com
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  • The pollutants that are directly emitted to the environment from the source is known as ______.

    water pollution
    secondary pollutant
    primary pollutant
    environment pollution
    air pollution
    land pollution
  • The sources of air pollution that are directly related to the activities of the nature are called ______.

    natural sources
    artificial sources
    greenhouse effect
    secondary sources
    over pollution
    primary sources
  • What is the term used for describing any undesirable changes in the fresh air which harms humans and other living beings?

    all of them
    water pollution
    environmental pollution
    land pollution
    sound pollution
    air pollution
  • Which of them is the cause of decreased visibility and lack of sunlight on the Earth's surface?

    sound pollution
    none of them
    air pollution
    land pollution
    noise pollution
    water pollution
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