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The Montreal Protocol was designed to help save the stratospheric ozone layer by banning substances that contained CFCs.
Which substance would NOT be banned under the Montreal Protocol?
Coolants used in air conditioning units.
Propellants used in aerosol room sprays or deodorants.
Cleaning solvents used on circuit boards.
Blowing agents used to create foam packing materials.
Asbestos used to make fire-proof vests.