The more complex the chemistry, the less economically viable. Hydrogen is just H2. Diesel is a complex hydrocarbon. A viable future, would be a highly distrib

The more complex the chemistry, the less economically viable. Hydrogen is just H2. Diesel is a complex hydrocarbon. A viable future, would be a highly distributed network of hydrogen stations, with Hydrogen generated from solar energy, with enough reserve capacity to act as a base load plant. Extracting energy from hydrogen is a well understood process.