The production and consumption of ODSs such as aerosols, halons, CFCs, HCFCs, and methyl bromide are controlled under what?

• A. The Kyoto Protocol
• B. The Montreal Protocol
• C. The Paris Agreement
• D. The Stockholm Convention

Answer: (B)

Controlling ozone-depleting substances is the mandate of the Montreal Protocol. This treaty was created to protect the ozone layer by phasing out the production and consumption of ozone-depleting chemicals such as CFCs, halons, HCFCs, methyl bromide, and related agents used in aerosols and other applications. It established concrete phase-out schedules, allows for amendments to add new substances, and includes trade controls to prevent persistence of use. The other agreements focus on different environmental issues: the Kyoto Protocol and Paris Agreement target greenhouse gases and climate change, while the Stockholm Convention deals with persistent organic pollutants. So the Montreal Protocol is the framework that directly governs these substances.