Arnault Barichella is a post-doctoral researcher with the Institute for Sustainable Energy at the Université Paris-Saclay, where he works on local climate policies and hybrid hydrogen engines. He received his PhD in Political Science from Sciences Po Paris, with a thesis comparing multilevel climate governance in the US and France; he is an affiliated researcher at Sciences Po’s Center for European Studies. Arnault obtained his Masters’ degree from Sciences Po Paris, his BA degree from Oxford University, and was awarded a visiting fellowship at Harvard University.