Updated 5:18 pm, Tuesday, May 29, 2018

Photo: Rich Pedroncelli, AP

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McGregor Scott, right, the United States Attorney for the Eastern District of California, flanked by California Attorney General Xavier Becerra, center, discusses an increase in the use of a banned pesticide at illegal marijuana farms hidden on public lands Tuesday, May 29, 2018, in Sacramento, Calif. Research by Mourad Gabriel, left, the executive director and senior ecologist at Integral Ecology Research Center, and his colleagues found the highly toxic pesticide Carbofuran, which can’t legally be used in the Unites States, at 72 percent of grow sites last year, up 15 percent from 2012. less McGregor Scott, right, the United States Attorney for the Eastern District of California, flanked by California Attorney General Xavier Becerra, center, discusses an increase in the use of a banned pesticide at … more Photo: Rich Pedroncelli, AP

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Photographs showing the harm done to wildlife caused by the use of a banned pesticide at illegal marijuana farms hidden on public lands is displayed at a news conference, Tuesday, May 29, 2018, in Sacramento, Calif. Researchers found the highly toxic pesticide Carbofuran, which can’t legally be used in the Unites States, at 72 percent of grow sites last year, up 15 percent from 2012. less Photographs showing the harm done to wildlife caused by the use of a banned pesticide at illegal marijuana farms hidden on public lands is displayed at a news conference, Tuesday, May 29, 2018, in Sacramento, … more Photo: Rich Pedroncelli, AP

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McGregor Scott, right, the United States Attorney for

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