Tell your state senator: Ban Roundup

The most widely used pesticide in the U.S. is a threat to endangered species. A report found that Roundup's main ingredient -- glyphosate -- is likely to harm 93 percent of endangered plants and animals.

One endangered species that Roundup harms is the monarch butterfly -- an iconic creature that is rapidly disappearing. To help save this species -- and hundreds of others -- we need to ban glyphosate.