The 1987 Montreal Protocol was an international agreement designed to phase out chemicals that deplete what protective layer of the Earth's stratosphere?
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Ozone layer
Ozone (O3) is an allotrope of oxygen. The protocol successfully phased out the use of chlorofluorocarbons (CFCs), which were found to be creating a 'hole' in the ozone layer.
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- The 1987 Montreal Protocol was established to protect what part of the stratosphere from chemical depletion?