Insect attacks among threat to US forests, worsened by drought, climate change

Associated Press: When defoliated trees are added to those killed outright, the acreage significantly damaged by insects since 2003 totals about 50 million -- 8 percent of forest area in the lower 48 states, the report says. The victims range from Rocky Mountain pine forests hammered by bark beetles to ash stands in Northeastern and Upper Midwestern states, where authorities have struggled to contain an emerald ash borer invasion. By comparison, about 13 million acres were scorched by fires during the same period,......

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