Brazil's Amazon Soy Moratorium reduced deforestation.

Between 2004 and 2012, multiple policies contributed to one of the great conservation successes of the twenty-first century-an 84% decrease in the rate of Brazilian Amazon deforestation. Among the most prominent of these policies is the Amazon Soy Moratorium (ASM), an agreement by grain traders not to purchase soy grown on recently deforested land. The ASM inspired widespread adoption of similar zero-deforestation commitments, but its impact is poorly understood due to its overlap with other conservation policies.