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Reply to: Overestimating outsourced biodiversity loss may misguide policy

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Why This Matters

This article highlights the importance of accurate data interpretation in assessing the environmental impact of export agriculture, which is crucial for developing effective policies. Misestimating biodiversity loss could lead to misguided strategies that either overstate or understate the true ecological footprint of global supply chains. For consumers and industry stakeholders, understanding these nuances ensures more informed decisions and responsible sourcing practices.

Key Takeaways

replying to: D. A. Martin et al. Nature https://doi.org/10.1038/s41586-026-10370-5 (2026).

In the accompanying Comment, Martin et al.1 raise concerns that the published source that we used to map the spatial footprint of consumption-driven deforestation2 includes areas of shifting cultivation for crops that are destined for local consumption, potentially inflating estimates of the biodiversity impacts of export agriculture. They draw on the example of vanilla cultivation in Madagascar to illustrate their concern. Although global analyses such as ours inevitably involve trade-offs, the methods that we applied do not substantially overattribute shifting cultivation to export agriculture, for reasons described in the published data source2 and in our Article3, and as we explain in additional detail below. Several of the concerns raised by Martin et al.1 further reflect differences in interpretation of how our results should be understood to apply at subnational scales.