EVERYDAY SCIENCE

Detailed explanation-1: -Adopted on 16 September 1987, the Protocol is to date one of the rare treaties to achieve universal ratification.

Detailed explanation-2: -The Montreal Protocol, finalized in 1987, is a global agreement to protect the stratospheric ozone layer by phasing out the production and consumption of ozone-depleting substances (ODS).

Detailed explanation-3: -In the mid 1970s it became a major political issue with regard to the use of CFCs in aerosol spray cans, and in 1978 the United States banned the nonessential use of CFCs as aerosol propellants.

Detailed explanation-4: -Since it was agreed internationally in 1987 to phase out ozone depleting substances (also known as ODS), 196 countries have ratified the Montreal Protocol.