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The international response to climate change has been inadequate, but not zero. There are 1,800 climate change laws worldwide. We use panel data on legislative activity in 133 countries over the period 1999–2016 to identify statistically the short-term and long-term impact of climate legislation. Each new law reduces annual carbon dioxide (CO2) emissions per unit of gross domestic product by 0.78% nationally in the short term (during the first three years) and by 1.79% in the long term (beyond three years). The results are driven by parliamentary acts and by countries with a strong rule of law.
Eskander, S.M.S.U., Fankhauser, S. Reduction in greenhouse gas emissions from national climate legislation. Nat. Clim. Chang. (2020). https://doi.org/10.1038/s41558-020-0831-z
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