Uranium
Explanation:
you can find this out because wind, water and solar are all renewable energy sources
It’s d my friend, wind will always be here, water will always be here, solar energy is from the sun. uranium is like coal, only what it here from way back then is what we have
Here is a link http://listverse.com/2014/02/21/10-completely-bizarre-facts-about-world-dictators/