I hate to spoil your fun, but these dates are always some what wanky. When my grandpa was in school, they told him that there ist still enough cpal for 40 years. When my dad whas in school tey told him that there is still enough coal for 50 Years. My elementry school teacher told me the same. If ypu look it up today, you will find that the coal reserves last for another 80 to 150 years. Resources dont run out. They get more expensive as the reserves dwindel leading to the developement of alternatives.