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Bats in North America are under a two-pronged attack but they are not the only victim - so is the U.S. economy. Gary McCracken, head of the Department of Ecology and Evolutionary Biology at the University of Tennessee, Knoxville, analyzed the economic impact of the loss of bats in North America in agriculture and found it to be in the $3.7 to $53 billion a year range.

World population will reach 7 billion this year, prompting new concerns about whether the world will soon face a major population crisis.

South Korea's largest business group Samsung signed an initial deal Wednesday to invest $7.04 billion in a state project to build a green energy complex on reclaimed wetland.