Governments around the world have adopted a growing range of climate policies to reduce greenhouse gas (GHG) emissions. Yet, important questions remain on their real world effectiveness –and possible unintended effects, such as carbon leakage.

OECD climate policy data offers unique insight for policy evaluation. Aligned with the UNFCCC and IPCC reporting frameworks, they systematically track climate mitigation policies across countries and over time, enabling empirical analysis on their effects.

What can we learn from existing policies? Which ones work, and under what conditions? How robust is the evidence? And how can better policy data strengthen ex‑post evaluation and inform future climate action?

Join us at the next OECD Green Talks LIVE webinar on 19 May 2026 from 15:00-16:00 CEST as we discuss these and other questions.

OECD Environment Director Jaime de Bourbon de Parme will give introductory remarks followed by a discussion moderated by Nathalie Girouard, Head of the OECD Environmental Performance and Information Division.