09/15/2014
Monarch Butterfly's Numbers Fly Dangerously Low
The once common monarch butterfly finds itself in a fight for survival after its population has plummeted 90 percent since 1995. Some blame the decline on the widespread use of herbicides in farming for destroying milkweed plants essential for the species survival.
■Class discussion: Have you ever seen a monarch butterfly? How many species of plants and animals become extinct every year? What are the main causes of for the continuing loss of species? How could the loss of some these plants and animals threaten human survival? What can you do about it?