Exclusive: world’s biggest emitters making most progress in introducing policies, study shows, but emissions still set to rise by 2.7C

The United States and India have made the greatest progress among the world’s top 20 economies in implementing climate policies since the 2016 Paris Agreement, a study commissioned by the Guardian has found.

The data underscores the importance of political leadership and international coordination, both of which are coming under intense pressure ahead of the inauguration of Donald Trump, who has threatened to pull the US out of the United Nations climate treaty.