The Montreal protocol was concerned with: A Persistent organic pollutants B Global warming and climate change C Substances that deplete the ozone layer D Biosafety of genetically modified organisms
Option C. Montreal Protocol on substances that deplete the ozone layer was signed in 1987 and finalised in 1989 under the aegis of the United Nations. It provided a treatise to phase out the eight recognised ozone-depleting substances from usage and searching for their alternatives. It is binding on the countries who have ratified it, so it has shown some remarkable success. A. Montreal Protocol refers to substances that deplete the ozone layer B. Stockholm convention was signed for persistent organic pollutants. C. Kyoto Protocol was signed for global warming and climate change. D. Cartagena Protocol was signed for biosafety of genetically modified organisms. Hence, the correct answer is 'Substances that deplete the ozone layer'
