For instance, since 2005 HSBC has purchased 900,000 tons of carbon credits to neutralize what its branches worldwide create by consuming electricity, taking business trips, and so forth.
這類基於企業、個人需求而「自願」以碳交易來抵銷碳排放的風潮逐漸普遍，例如匯豐銀行自 2005 年起每年購買 90 萬噸碳權，以抵換其全球分公司的用電、飛航、交通、出差住宿等碳排，並宣稱已成為「碳中和銀行」。