Billion Dollar Bats in Danger

Bats mean big money for American farmers. Their nightly bug-munching saves U.S. agriculture between $3.7 to $53 billion a year on pesticides and crop losses. A U.S. Geological Survey study, published in Science, put a dollar sign on the services bats offer free of charge. The study found that bats are high rollers in the game of insect control. But the researchers are worried.

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