Only the rare Blue hydrogen is renewable

Green Hydrogen is made by electrolysis of water = use electricity, get Hydrogen. No emissions. Green. This technology is mature enough to be deployed at mass scale, and produce localized stored energy that can be transported/exported. Costs are $2/kg when using “near surplus” solar at 2c/kwh input cost. For a FC vehicle, this is equivalent to $1/gallon gasoline in range.

Blue H2 is not green or renewable. While the process gas reaction can be separated to capture/split the CO2 gas produced, that CO2 needs to be transported and pumped underground, and the heat required for the reaction generally is produce by NG combustion that needs a chimney, and produces emissions.

H2 is not a dead end technology. It is ahead of its time, as solar penetration to provide enough energy every day is solar that produces surpluses on most days, and is not yet here, or even in China yet. Ever more solar does require a monetization path past electrical saturation, and green H2 is the best path for its chemical applications, transportation, energy backup, and rocket fuel.