> but, how do you count the carbon emissions. for anything fuel-based (both fossil and "renewable" such as wood pellets and biogas), we know how much CO2 a giv

> but, how do you count the carbon emissions. for anything fuel-based (both fossil and "renewable" such as wood pellets and biogas), we know how much CO2 a given quantity of fuel emits. Place a tax on the importers and producers of the raw material, that's it. Other processes that emit greenhouse gases - especially construction and agriculture such as cow farms - are a bit more difficult to calculate, but there's enough data available to make reasonable averages.