In a study published this month in the journal Ecological Applications, Gary Lovett and 15 colleagues estimated that 63 percent of U.S. forest land, or about 825 million acres, is at risk of increased damage from established pests, and new pests continue to arrive with cargo shipments from overseas. ... "I think there would be resistance from overseas partners that are shipping a lot of material using these wood pallets," said Frank Lowenstein, deputy director of the New England Forestry Foundation, a conservation group based in Littleton, Massachusetts.