The electricity maps site calculates the carbon intensity of the grid imports and lists it on the map and the country specifically views (click for more info):

The electricity maps site calculates the carbon intensity of the grid imports and lists it on the map and the country specifically views (click for more info): https://app.electricitymaps.com/map/72h/hourly https://app.electricitymaps.com/map/72h/hourly As a general rule, the imports are imported because they are cheaper and generally cheaper means cleaner.