What property makes chlorofluorocarbons (CFCs) harmful to the ozone layer?
CFCs release chlorine atoms in the stratosphere, which destroy ozone molecules, contributing to ozone depletion.
Which layer of the atmosphere is most affected by CFCs?
CFCs damage the ozone layer, which is located in the stratosphere and protects Earth from UV radiation.
What is the primary environmental impact of CFC emissions?
The destruction of the ozone layer caused by CFCs leads to increased UV radiation reaching Earth’s surface.
Which international treaty addresses the phase-out of CFCs?
The Montreal Protocol is an international agreement designed to phase out substances that deplete the ozone layer, including CFCs.
Why were CFCs widely used before their environmental impact was known?
CFCs were favored due to their stability, non-flammability, and effectiveness as refrigerants and propellants.
What happens when UV rays break down CFCs in the atmosphere?
The breakdown of CFCs by UV rays releases chlorine atoms, which then deplete ozone molecules.
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Which health risk is associated with increased UV exposure due to ozone depletion?
Ozone depletion leads to increased UV radiation, which elevates the risk of skin cancer and other health issues.
What is a suitable alternative to CFCs in refrigeration?
Hydrofluorocarbons (HFCs) are commonly used as less harmful substitutes for CFCs in cooling systems.
How can technicians minimize CFC emissions during equipment servicing?
Using proper recovery and recycling equipment prevents the release of CFCs into the atmosphere.