Why Monarch Butterflies Need Endangered Species Act Protection

September 23, 2014 5:00 PM

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As monarch butterflies make their long journey from the U.S. to Mexico this fall, let's pause to consider the 90 percent drop in their numbers over the past twenty years. So steep has been their decline that a petition has been filed with the U.S. Fish and Wildlife Service requesting protection for the monarch under the Endangered Species Act.

This eloquent and detailed document lays out the research showing not only the decline but the causes of it. At the top of the list is the use of the herbicide glyphosate - best known as the active ingredient in Roundup - on vast Midwestern fields of crops genetically engineered to be unaffected by ...

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