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Witnesses Debate Crypto Mining's Efficiency in Congressional Hearing on Environment

Lawmaker questions ranged from basics on blockchain to queries about different energy sources.

Rep. Diana Degette (D-Co.) chaired Thursday's hearing on crypto's energy impact. (Andrew Harrer/Bloomberg via Getty Images)
Rep. Diana Degette (D-Co.) chaired Thursday's hearing on crypto's energy impact. (Andrew Harrer/Bloomberg via Getty Images)