Answer-Montreal Protocol is related to?

The Montreal Protocol on Substances that Deplete the Ozone Layer is the landmark multilateral environmental agreement that regulates the production and consumption of nearly 100 man-made chemicals referred to as ozone depleting substances ODS. When released to the atmosphere, those chemicals damage the stratospheric ozone layer, Earths protective shield that protects humans and the environment from harmful levels of ultraviolet radiation from the sun.