Just to play devils advocate for a minute: I live in Montréal Québec Canada, and the power entering my home is almost certainly generated at a hydroelectric dam. [0] There is an ecological impact from damming rivers, but in terms of GHG emissions, it's drastically better environmentally compared to coal or natural gas electricity generation systems.

If the service I'm using is hosted on us-east-1, it's using power from virginia, which uses a mix of natural gas and nuclear. [1]

Based on that... is running more logic on my computer or on an edge server within Québec, actually using less GHG-emitting energy than running it on the origin server?

[0] https://www.cer-rec.gc.ca/en/data-analysis/energy-markets/pr...

[1] https://en.wikipedia.org/wiki/List_of_power_stations_in_Virg...