In her new book “Rancher, Farmer, Fisherman: Conservation Heroes of the American Heartland,” published Sept. 6, Miriam Horn follows five people whose forward-looking practices sometimes defy widely held beliefs about sustainability and farming. Below, Horn pulls from the story of Justin Knopf, a farmer in central Kansas, to show that industrial-scale farming — and yes, even the pesticides that come with it — can be sustainable.
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