Study finds indigenous practices curb deforestation better than bans

A study of 18,000 forest patches found that unwritten community rules in small communities can limit slash-and-burn clearing and allow trees to return.

The research, published in Proceedings of the National Academy of Sciences, was led by Sean Downey of The Ohio State University.

In traditional villages, farmers rely on neighbors for help clearing plots; if a farmer requests too large a field (e.g., 20 acres instead of 2 acres), fewer people help, keeping land use in check.

Satellite images and computer models show that swidden agriculture does not destroy entire rainforests, as critics have argued, but can be sustainable under local norms.

The study recommends that policymakers support and uphold these traditional practices for robust environmental conservation.