The popularity of non-fungible tokens (NFTs) soared in 2021. Multimillion-dollar sales of the blockchain-based ownership certificates featured everything from an autographed tweet to virtual sneakers. Not everyone is impressed. The steep carbon footprint of the digital assets irks environmentalists; their opacity worries those combating money laundering and tax evasion.
2021年，非同質化代幣(NFT)熱度大增。這種基于區(qū)塊鏈的所有權證明往往能賣出數百萬美元，內容涵蓋從簽名推文到虛擬運動鞋的一切事物。不是所有人都趨之若鶩。這種數字資產厚重的碳足跡激怒了環(huán)保主義者；它們的不透明讓打擊洗錢和逃稅的人感到擔憂。
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