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They did this by putting a cap in the algorithm, meaning computers will no longer be able to solve the equation - mine Bitcoin - once 20,999,999,9769 are mined. As the difficulty and complexity of Bitcoin mining has increased, the computing power required has also gone up. Bitcoin mining consumes about 147 terawatt-hours of electricity each year, more than most countries, according to the Cambridge Bitcoin Electricity Consumption Index. You’d need 9 years’ worth of the typical U.S. household’s electricity to mine just one bitcoin as of August 2021. Quartz visited the mine in Ordos on Aug. 11. Not only do rigs take up power, they also generate heat. The more rigs you have, the hotter it gets. If you don't want your rigs to melt, you need some cooling. Many mining rigs have multiple built-in computer fans. But if you have multiple rigs, the room quickly gets hot, requiring external cooling. Small operations, like those run by individuals, can get by with a typical standing fan. Mining centers, however, need a lot more cooling, which in turn requires even more electricity.