"The record cold U.S. temperatures may have a silver lining - killing off some tree-eating forest pests that have spread dangerously as the general climate warms up, scientists said."
"The deep freeze that shattered decades-old records this week - causing fatalities and snarling air, road and rail traffic - could adversely affect pests such as the emerald ash bore, which is responsible for killing more than 10 million trees, said Robert Venette, a research biologist with the U.S. Forest Service in St. Paul, Minnesota.
Eighty percent of emerald ash bore may have been destroyed where temperatures fell to -22 to -26 Fahrenheit (-30 to 32 Celsius), he said.
'That's when they really start to freeze and die. And we've been seeing those kind of temperatures here in Minnesota, particularly in the Twin Cities and points north,' Venette explained."