They do tell you the carbon impact right on the region selector: https://cloud.google.com/blog/topics/sustainability/pick-the-google-cloud-region-with-the-lowes

They do tell you the carbon impact right on the region selector: https://cloud.google.com/blog/topics/sustainability/pick-the-google-cloud-region-with-the-lowest-co2 https://cloud.google.com/blog/topics/sustainability/pick-the... and also https://cloud.withgoogle.com/region-picker/ https://cloud.withgoogle.com/region-picker/ is quite nice.