External Media Coverage
This episode is produced and published by Harvard Business School / HBR Presents. Wootomatic hosts this embedded stream for educational and commentary purposes.

Calyx Global: Improving the Quality of Carbon Credits
Hosted by Brian Kenny / Harvard Business Review
Calyx Global: Improving the Quality of Carbon Credits
Episode Summary
In 2021, Donna Lee and Duncan van Bergen founded Calyx Global to improve the quality of carbon credits sold in the voluntary carbon market. Organizations buy those credits for their decarbonization efforts to meet net-zero commitments. The startup had carefully avoided perceptions of conflicts of interest. But it was a challenging time for the industry. Lee and van Bergen had to decide whether tapping new revenue streams would jeopardize their trustworthy reputation. In this episode, HBS Professor Mike Toffel and Duncan van Bergen discuss the company’s business model, its approach to ratings, and the emerging competitive landscape in the case, “Calyx Global: Rating Carbon Credits.”
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