Can we really keep the climate promises made in Paris? A team of scientists from CEA, the University of Reims Champagne-Ardenne and CNRS, provide a nuanced answer in a study published in the journal Nature Urban Sustainability. Using an innovative modeling tool, they have mapped with great precision the CO₂ emissions of the Paris metropolis – and the efforts needed to meet climate targets. While those for 2030 are within reach, the research team reveals that CO₂ emission reduction targets for 2050 would require a significant strengthening of current measures.
Authors
Ivonne Albarus (CEA/LSCE), Thomas Lauvaux (Université de Reims Champagne-Ardenne), Hervé Utard (Origins.earth), Philippe Ciais (CEA), Patricia Crifo (École polytechnique), Valérie Gros (CNRS)
Publication :
Albarus, I., Lauvaux, T., Utard, H. et al. Unraveling climate targets across the Paris conurbation as a gauge of city ambitions. npj Urban Sustain 5, 27 (2025).
https://doi.org/10.1038/s42949-025-00206-y