The main way to obtain Hydrogen is:

• The reforming of natural gas
• The oxidation of natural gas
• The gasification of coal
• The electrolysis of water
  
  Electrolysis, the process of separating elements and compounds with an electric current, is the best way to produce hydrogen. Renewable energies like solar, wind, and hydropower, can produce enough electricity to obtain hydrogen from water. As a result, it is possible to obtain and use hydrogen from renewable energy sources in a process that emits completely zero emissions.