From msn.com: Butterflies are rapidly fluttering out of existence from coast to coast, according to a new assessment published Thursday, at a rate that scientists worry could upend ecosystems and undercut pollination that sustains America’s crops.
The total number of butterflies in the contiguous United States has declined 22 percent over a 20-year period, according to a study in the journal Science, as shrinking habitat, rising temperatures and a toxic array of pesticides kill off the delicate insects.
