“Blockchain technology holds immense promise that may make our personal information more secure and economy more efficient,” the letters said. “However, the energy consumption and hardware required to support [Proof-of-Work]-based cryptocurrencies may, in some instances, produce severe externalities in the form of harmful emissions and excess electronic waste (e-waste).”
Source: https://www.coindesk.com/policy/2022/08/18/house-lawmakers-send-letters-to-4-us-crypto-miners-asking-for-details-on-environmental-impact/?utm_medium=referral&utm_source=rss&utm_campaign=headlines