Explanation

United Nations Framework Convention on Climate Change (UNFCCC):

• The treaty was signed at the United Nations Conference on Environment and Development (UNCED), also known as the Earth Summit. 
• The Summit held in Rio de Janeiro in the year 1992.
• The Convention came into force on 21st March 1994.
• The Convention aims at combating climate change by controlling the emission of Greenhouse gases that cause global warming.
• The Convention currently has 197 countries as its members and provisions of the treaty are not binding on them, rather only provide directions to achieve the goals.