Proof of Work! A 21 feet tall pile of coal at Rockefeller Center in NYC, without it all those buildings around it wouldn’t exist! 
Discussion
That coal looks like needs to be put to good use! 😂 👍🏿
Proof of Work! A 21 feet tall pile of coal at Rockefeller Center in NYC, without it all those buildings around it wouldn’t exist!
That coal looks like needs to be put to good use! 😂 👍🏿