Issued carbon credit trends by year (IMAGE) Kyushu University Caption The researchers showed that the volume of carbon credits issued in the voluntary carbon market increased rapidly in the Americas, Africa & Middle East and the Asia-Pacific region. In particular, the Americas and Africa & Middle East regions dramatically increased the volume of carbon credits from 2009 to 2015, with similarly large increases coming from the Asia-Pacific region from 2006 to 2009, and 2015 to 2019. Credit Fujii et al., Cleaner Environmental Systems, 2024, https://doi.org/10.1016/j.cesys.2024.100164 Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.