> except as a tool to mitigate the carbon consumption of existing appliances. Does it matter if you reduce CO2 it at the household point of combustion if the f

> except as a tool to mitigate the carbon consumption of existing appliances. Does it matter if you reduce CO2 it at the household point of combustion if the fuel is ultimately C02 emissions heavy? Accounting for the inefficiencies of cracking natural gas into H2, it may actually increase the GHG emissions, not to mention being more expensive (due to energy loss during the gas cracking process). Furthermore, the primary local issue with combustion appliances is air quality, and mixing in a little H2 not going to do much to improve that. So piping fossil derived hydrogen into gas pipes doesn't solve either GHG emissions or local air quality issues. You're better off continuing with piped methane gas and phasing in electric heat pumps over time.