A Tibetan bitcoin miner poses with his shelves of computers at a bitcoin mine near a hydropower station in China's Sichuan province. The digital currency consumes huge amounts of energy for complex calculations to verify every transaction ever made for each bitcoin. - AP
The growth of bitcoin is fueling speculation and debate about the environmental impact of the collective energy needed to power the virtual currency in the era of climate change.
Here are some questions and answers about the issue:
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