Quantifying the impact of the food we eat on species extinctions
Thomas Ball, Michael Dales, Alison Eyres, Jonathan Green, Anil Madhavapeddy, and Andrew Balmford.
Working paper at Cambridge Open Engage.
Agriculturally-driven habitat degradation and destruction is the biggest threat to global biodiversity, yet the impacts on extinctions of different types of food and where they are produced and the mitigation potential of different interventions remain poorly quantified.
Here we link the LIFE biodiversity metric – a high resolution global layer describing the marginal impact of land-use on extinctions of ~30K vertebrate species – with food consumption and production data and provenance modelling. Using an opportunity cost framing we discover that the impact of producing one kilogram of different food commodities on species extinction risks varies widely both across and within foods, in many cases by more than an order of magnitude.
Despite marked differences in per-capita impacts across countries, there are consistent patterns that could be leveraged for mitigating harm to biodiversity. In particular, we find that animal products and commodities grown in the tropics are generally much more impactful than staple crops and vegetables grown elsewhere. We anticipate the approach and results outlined here could inform decision- making across many levels, from national policies to individual dietary choices.
Related News
- Updated preprint on quantifying biodiversity cost of food consumption / Feb 2025
- Quantifying the impact of the food we eat on species extinctions / May 2024
Older versions
There are earlier revisions of this paper available below for historical reasons. Please cite the latest version of the paper above instead of these.
This is v1 of the publication from May 2024.