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

Google doesn't really have a concept of datacenters internally. In simplified terms everything runs on a borg cell, which usually but not always exists in a single building. Within a region one of your GCP services could be running on one cell, with another service running on another in a different building. If a failure happens or maintenance needs to be done, a cell could be drained to another one in the same region.

Google has "data centers" internally. People argue about the various definitions but a DC is usually one or a few buildings containing several clusters, each of which is fairly "close" to all its components.

Really, Google doesn't have an entire org called "dcops"?

Not in a way that is relevant to a cloud customer asking what building their jobs are running in.

That's not how carbon impact works. You don't buy "clean" products. You buy products from vendors who have an overall average mix of production that meats a "clean" threshold, and/or buys credits from someone else who exceeds threshold.

In Google's (and for instance Scaleway too), the point is that some of their DCs use renewable energy only, thus are "clean". If however you use the "wrong" Google region which is hosted in Equinix's DCs, which happen to be powered by coal, it's not even remotely close. However Google make the distinction and you can easily check which region is "clean" and which isn't.