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Wood-burning restrictions and air pollution: the case of air quality warnings in southern Chile

Published online by Cambridge University Press:  08 September 2025

Cristian Concha
Affiliation:
Department of Economics, University of Talca, Talca, Chile
Nathaly M. Rivera*
Affiliation:
Department of Economics, University of Chile, Santiago, Chile
*
Corresponding author: Nathaly M. Rivera; Email: nmrivera@fen.uchile.cl

Abstract

Despite the substantial evidence linking particulate matter exposure to adverse health outcomes, a large portion of the global population, particularly in low-income countries, continues to rely on highly polluting fuels, such as wood, for cooking and heating. This study evaluates the immediate effects of wood-burning restrictions, which are triggered by air quality warnings, on levels of fine (PM2.5) and coarse (PM10) particulate matter in southern Chile. Using a difference-in-differences design that incorporates pre-policy data, we provide plausible causal estimates indicating that wood-burning restrictions lead to significant reductions in hourly PM10 and PM2.5 concentrations during the most severe air quality warning. Additional analyses, including a regression discontinuity design, further support these findings. While our analysis suggests that wood-burning restrictions are effective, they may not be sufficient to reduce air pollution concentrations to levels that are considered safe for public health.

Information

Type
Research Article
Copyright
© The Author(s), 2025. Published by Cambridge University Press.

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