Explanation
The Montreal Protocol is also known as (b) Ozone Treaty.
The Montreal Protocol is an international environmental agreement that was established in 1987. Its primary goal is to protect the ozone layer by phasing out the production and consumption of substances that deplete ozone, such as chlorofluorocarbons (CFCs), halons, and other ozone-depleting substances (ODS).
The protocol was named after the city of Montreal, Canada, where it was agreed upon and signed by participating nations. It has been recognized as a significant international environmental treaty aimed at addressing the depletion of the ozone layer and preventing the harmful effects of increased ultraviolet radiation reaching the Earth's surface.
Therefore, the Montreal Protocol is commonly referred to as the (b) Ozone Treaty.