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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.
