What was the goal of the Montreal protocol?

The Kyoto Protocol is a legally binding agreement that all countries signed. It came into effect in 2005 and its aim is to reduce greenhouse gas emissions to lower levels in the atmosphere. All countries are now making efforts to reduce their emissions. (The US refused to ratify this convention, and Canada withdrew from it in 2011.)

To encourage research into substitutes for chlorofluorocarbons. Recycle existing chlorofluorocarbons rather than release them into the air and reduce the amount of the new production of chlorofluorocarbons in developed countries.
The Montreal Protocol is an international treaty designed to help protect the ozone layer. Its objectives include phasing out CFCs and HCFCs which are both harmful to the earth.
The Kyoto Protocol is a legally binding agreement that all countries signed. It came into effect in 2005 and its aim is to reduce greenhouse gas emissions to lower levels in the atmosphere. All countries are now making efforts to reduce their emissions. (The US refused to ratify this convention, and Canada withdrew from it in 2011.)