Alberta Boilers Safety Association (ABSA) Practice Test

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Prepare for the Alberta Boilers Safety Association Test. Study with flashcards and multiple-choice questions, each with hints and explanations. Pass your exam with the right preparation!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is one of the pollutants known to be particularly harmful to the earth's ozone layer?

DOT's
PVC's
BOD's
CFC's

The correct answer is: CFC's

Chlorofluorocarbons, commonly referred to as CFCs, are known to be particularly harmful to the earth's ozone layer. CFCs are synthetic compounds once widely used in refrigeration, air conditioning, aerosol propellants, and foam-blowing agents. When released into the atmosphere, CFCs rise up to the stratosphere, where they are broken down by ultraviolet radiation, releasing chlorine atoms. These chlorine atoms then interact with ozone (O3) molecules, leading to the depletion of the ozone layer, which serves as a protective shield against the sun’s harmful ultraviolet rays. Protecting the ozone layer is vital because it helps prevent increased rates of skin cancer, cataracts, and other health issues linked to higher exposure to ultraviolet radiation. Efforts like the Montreal Protocol have significantly reduced the use of CFCs, showcasing the global commitment to protect our ozone layer.