It is the first time a global dataset of policies has been compared and ranked in this way. However, the authors say the good news is that policymakers can learn from the 63 effective cases where climate policies had led to meaningful reductions to get back on track. The Paris emissions gap can be closed: Focusing on the 63 cases of effective climate policies would close the current emissions gap to meet the Paris Targets by 26% -41%, a significant contribution. Data from the UN estimates that there remains a median emissions gap of 23 billion tonnes of CO2 equivalent by 2030. The study ‘Climate policies that achieved major emission reductions: Global evidence from two decades’ has been published in Science.