Explanation
The name of the agreement made between countries to reduce ozone depletion is:
(B) Montreal Protocol.
The Montreal Protocol on Substances that Deplete the Ozone Layer is an international environmental treaty that was signed on September 16, 1987. Its objective is to protect the ozone layer by phasing out the production and consumption of ozone-depleting substances (ODS). The protocol has been ratified by nearly every country in the world.
The Montreal Protocol has been highly successful in reducing the production and use of substances such as chlorofluorocarbons (CFCs), halons, carbon tetrachloride, and other ODS that contribute to the depletion of the ozone layer. Through the implementation of the protocol, the production and consumption of these substances have significantly decreased, leading to the recovery of the ozone layer.
It is important to note that while the Montreal Protocol primarily addresses ozone depletion, other international agreements like the Kyoto Protocol (D) and the Paris Agreement focus on reducing greenhouse gas emissions and addressing climate change. The Rio Earth Summit (C), also known as the United Nations Conference on Environment and Development held in 1992, addressed various environmental issues including sustainable development, biodiversity conservation, and climate change.