![Monsanto blamed for disappearance of monarch butterflies Monsanto blamed for disappearance of monarch butterflies](https://mtic.us/wp-content/uploads/2014/01/000_was3500854.si_-310x168.jpg)
As scientists continue to track the shrinking population of the North American monarch butterfly, one researcher thinks she has found a big reason it’s in danger: Monsanto’s Roundup herbicide.
As scientists continue to track the shrinking population of the North American monarch butterfly, one researcher thinks she has found a big reason it’s in danger: Monsanto’s Roundup herbicide.