Plug Power and Nikola could be good longshot plays in this nascent market.Hydrogen power is often hailed as the ideal green alternative to fossil fuels since it can be produced using renewable energy like wind or solar to produce the electricity needed to split water into its component parts of hydrogen and oxygen. The hydrogen that is extracted is then used to power an engine and the only byproduct of the burned fuel is water. But being an ideal fuel hasn't been enough of an incentive for companies in this ...