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In 2015, world leaders met in Paris for the COP21 conference. The results of that conference were that, for the first time, world leaders reached an agreement on large-scale action against climate change. Some 196 participating states around the world agreed to limit global warming to well below 2°C, preferably 1.5°C<ref name=":12">[https://unfccc.int/process-and-meetings/the-paris-agreement/the-paris-agreement UNFCC]</ref>. Nearly all countries made a commitment (a pledge or a “'''nationally determined contribution'''”, NDC) to limit their greenhouse gas emissions and lower their contribution to climate change. These pledges were to be updated every five years.
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