In an interview with Yale Environment 360, Romero, who is from Costa Rica and is coordinator of the Mesoamerican Alliance of Peoples and Forests, calls out the “carbon cowboys” — the brokers who he says are wrecking efforts to allow Indigenous communities to have ownership of the carbon credits generated on their land, and who, by acting unscrupulously and secretively, are undermining global hopes of using nature to mitigate climate change