The Paris Agreement culminates a six-year transition towards an international climate policy architecture based on parties submitting national pledges every five years. An important policy task will be to assess and compare these contributions. We use four integrated assessment models to produce metrics of Paris Agreement pledges, and show differentiated effort across countries: wealthier countries pledge to undertake greater emission reductions with higher costs.
At the United Nations Climate Change Conference in Paris in December 2015, 195 countries adopted the first universal global climate agreement which sets out a global action plan to combat climate change. The Paris agreement is anchored on the implementation between 2020 and 2030 of nationally determined contributions.