Space is very inspiring for me. I found some interesting information on Hydrogen as fuel for the future. Here is a small part of the following link:
“One day all the coal will be used up. Without coal, no more progress for modern life.” “What will they burn in the place of coal?”
“Water,” replied Cyrus Smith. “but decomposed into its basic elements. Water will one day be employed as a fuel, hydrogen and oxygen will furnish an inexhaustible source of heat and light. Then there will be nothing to fear. As long as this earth is inhabited, it will provide for the needs of its inhabitants. I believe that when the coalmines have been exhausted, they will heat and be heated with water. Water is the coal of the future.”