Hydrogen fuel has a global warming effect I've only seen once mentioned in the press.
Hydrogen escaping into the upper atmosphere reacts with hydroxyls. It is the hydroxyls that partly reduce the accumulated methane in the atmosphere, and methane is 22 times more powerful as a global warming gas than CO2.
Without the hydroxyls to remove the methane, the global warming effect would be greater. I'm not a proponent of global warming theory but every proposed solution has a drawback.
Randy Dutton
Washington State, US
Plasma technique converts landfill methane to jet fuel
Trevor; there are still many landfill sites in the UK where the methane is not captured but not only that, where there is protein waste in them, they...