Microsoft is using the standard way to reckon GHG emissions in climate science, and accepting an order of magnitude more emissions into the calculation. The EPA

Microsoft is using the standard way to reckon GHG emissions in climate science, and accepting an order of magnitude more emissions into the calculation. The EPA has an OK explanation of the system: https://www.epa.gov/greeningepa/greenhouse-gases-epa https://www.epa.gov/greeningepa/greenhouse-gases-epa Though I think the MS article is easier to understand. If you think this is not a reasonable or accurate way to measure emissions, there are some great peer reviewed journals you could write to.