Doconomy Launches Voluntary Credit Card With a Carbon Spending Limit

Doconomy and Mastercard introduced DO Black in 2019, a voluntary credit card that measured purchases' estimated carbon emissions and stopped spending when the user's carbon limit was reached. Doconomy's chief executive later told PolitiFact the card was discontinued in 2022 after a change in business model. The card put a carbon-based spending restriction into a payment product people could choose to use.