One hundred and ninety-seven nations amend the Montreal Protocol to include a phase-out of hydrofluorocarbons.

Montreal Protocol

1987 treaty to protect the ozone layer

The Montreal Protocol on Substances That Deplete the Ozone Layer is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion. It was agreed on 16 September 1987, and entered into…