In New Zealand, a nationwide extermination campaign is underway–one of the most ambitious in the world. The country is home to more than 4,000 native species that are threatened or at risk of extinction. To protect their biodiversity, New Zealand has embarked on an experiment that aims to eradicate all invasive species by the year 2050. Can they pull it off? And how far should humans go to reverse the damage we’ve caused?

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