Farmed salmon and chicken have a global footprint — but the burden is concentrated

Industrial chicken and salmon farms are found around the world, but nearly all of the environmental burden of these operations is concentrated on geographical hotspots, according to a study. The work, published on 13 February in Current Biology, is the first to map the environmental pressures of farmed chicken and salmon on a global scale. It suggests that less than 5% of Earth’s surface bears 95% of the cumulative environmental burden of chicken and salmon production — a finding that could be used to inform agricultural policy.

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