Hydrogen can be a much greener fuel source - solar panels/ nuclear power providing the electricity to split water is much better for the environment.,(reply>), @Stephen's Game Channel To build that infrastructure will take a few decades so it's part of a long time solution.<br>It might also be far more efficient to use the heat of these reactors to thermaly decompose water into O2 and H2 than to first generate electricity.<br><br>Still it does not solve the other issue: Water supply.,(reply>), @Martijn Maas Nuclear.,(reply>), The moment we have more "green" electricity than we consume you have a point. But we don't, and solar is having similar issues as batteries.<br>To create enough electricity sources to have a surplus enough for large scale electrolysis is still a long way to go.