Jun 10 2021 COP 21 – or the 21 Conference of the Parties to United Nations Framework Convention on Climate Change (UNFCCC), to give it its full name – was a summit of all 197 world nations in 2015. Taking place in Paris, the Conference aimed to encourage all attendees to agree on strategies for reducing greenhouse gas emissions, achieving a net-zero carbon scenario and reducing global warming by an absolute maximum of 2°C in comparison to pre-Industrial Revolution levels. While some commentators hail the summit as a success in terms of securing the agreement of all 197 nations (and the later ratification of the vast majority), there are other critics who do not believe it went far enough in following the science to slow climate change or implementing concrete measures. Here’s a closer look at its main objectives and how effective it has been in achieving them.