Which agreement aimed to limit the production of CFCs to protect the ozone layer?

The Montreal Protocol is the correct agreement aimed specifically at limiting the production of chlorofluorocarbons (CFCs) to protect the ozone layer. Adopted in 1987, this international treaty was designed to phase out substances that deplete the ozone layer, which is crucial for shielding the Earth from harmful ultraviolet radiation. By setting legally binding commitments for countries to reduce and eventually eliminate the use of CFCs and other ozone-depleting substances, the Montreal Protocol has largely been credited with significant progress in ozone layer recovery.

The other agreements listed, while significant in their respective contexts, do not focus specifically on CFCs or ozone layer protection. The Kyoto Protocol primarily addresses greenhouse gas emissions and climate change, the Copenhagen Agreement aimed to build upon the Kyoto Protocol concerning climate policies, and the Rio Declaration emphasizes sustainable development principles rather than specific chemical substances harmful to the ozone layer. Therefore, the Montreal Protocol stands out as the dedicated international effort to combat CFC production and safeguard the ozone layer.