$this->bbcode_second_pass_quote('REAL Green', '')USGS says Powder River Basin has 35 years of coal left, not 250”
http://energyskeptic.com/2020/coal-powd ... -reserves/“The USGS did a survey of coal in the U.S. in 1974 and announced that America had 250 years of coal left. In 2007, the National Research Council wrote a report suggesting 100 years was more likely due to “a combination of increased rates of production…transportation issues, recoverability, and location”, and that the USGS ought to re-survey the U.S. to find out. Not until 2015 was a new survey done on the Powder River Basin (PRB) in Wyoming and Montana, which supplies 45% of U.S. coal. The USGS found that at best, 40 years of coal were left (35 years in 2020). Here’s how the USGS calculated this in Billions of Short Tons:
1,156 BST original resources (mostly coal that isn’t economic or technologically obtainable).
1,148 BST after subtracting out previously mined coal
179 BST geological constraints; subtract Environmental, societal, technological restrictions
162 BST Subtract too deep, too thin, high stripping ratios, mining technology limitations
25 BST 2% of original resource estimate after subtracting coal that is more expensive than the market value of coal”
If you are under thirty five years of age that might worry you. Me? not so much.