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In 1979, the United Nations Economic Commission for Europe (UNECE) implemented the Convention on Long-Range Transboundary Pollution. In 1985 most UNECE members adopted the Protocol on the Reduction of Sulphur Emissions, agreeing to reduce sulphur dioxide emissions by 30% (from 1980 levels) by 1993. All of the countries that signed the Protocol achieved this reduction.
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The Montreal Protocol is an international treaty designed to protect the ozone layer by phasing out the production of numerous substances that are responsible for ozone depletion.
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Under the Kyoto Protocol, industrialized nations agreed to cut their greenhouse gas emissions to a certain percentage below 1990 levels.
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The three countries joined an agreement to cut down on their dangerous greenhouse gas emissions by around 2030.
