OECD published a report[1] on EVs lately. I haven't read it but according to various press sources it claims that EVs might make things worse, e.g.[2]:

"The report assumes that diesel and gasoline-powered cars are going to be replaced with electric vehicles, eliminating tailpipe emissions, but that problematic PM emissions will remain or even increase."

[1] https://www.oecd-ilibrary.org/environment/non-exhaust-partic...

[2] https://www.treehugger.com/electric-cars-wont-save-us-from-p...