Jun 10, 2023 · The Paris Agreement was signed by 195 countries at the 21st Conference of the Parties (or “COP21”) to the United Nations Framework Convention on Climate Change (UNFCCC) at the end of 2015 [5,6], when 59 countries, accounting for 54% of the global carbon emissions, committed to zero carbon emissions by the middle of this century, including the European Union, Japan, South Korea, Canada, the