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Ecosystems

Ecosystems

Human activity damages Mexico–US border

09 Sep 2019
Mexico-US border
(Image credit MJCdetroit [CC BY 3.0 (https://creativecommons.org/licenses/by/3.0)])
Each year an estimated half a million people slip illegally over the Mexico-US border. Trying to sto

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Kate Ravilious is a contributing editor to Physics World
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