RE: HS2 Trialling Hydrogen Generators23 Aug 2021 11:37
Which rather begs the question "Hydrogen Generators using what as a primary source of power?" Its rather the same issue as to the "colour" of Hydrogen that is being proposed to reduce CO2 emissions. Unless the primary source of energy in the Hydrogen supply chain is fossil fuel free then there will be CO2 to be dealt with somewhere. Especially since the Green conversion technology physical infrastructure that needs to be built will almost certainly require substantial amounts of CO2 generating energy in its materials of construction.
I find the recent Mercedes ad claiming their factories will in the future only use renewable energy a little disingenuous. Notice they don't say cars!. The steel and other metals, wiring, plastics, wheels, tyres etc and most other items are of course all bought in. ie the CO2 generating bit is all outsourced.
Until you understand the whole supply chain ( including building the required replacement cars, boilers, grid infrastructure etc) in getting to the end product you just don't know that you have truly reduced greenhouse emissions.