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1 .This is Scientific American 60-Second Earth. I'm David Biello. Your minute begins now.
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2 .That's an air gun.
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3 .By exploding compressed air underwater, scientists map the subsurface of the seafloor.
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4 .The process can reveal new deposits of fossil fuels and other important information,
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5 .and now industry has permission to use airguns off the U.S.east coast.
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6 .Which means more dead whales.
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7 .Cetaceans and other marine life rely on their ears to navigate.
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8 .Air guns deafen them, if not kill them outright, as the U.S.Department of Interior admits.
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9 .The sound is 250 decibels or more, much louder than a jet engine.
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10 .Dozens of melon-headed whales washed up dead on Madagascar beaches following similar seismic air gun testing by ExxonMobil in 2008.
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11 .At new risk are cetaceans like the North Atlantic right whales.
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12 .Five hundred or fewer remain.
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13 .They'll have something like dynamite going off in their oceanic living room every 10 seconds for days or even weeks at a time now.
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14 .Alternatives exist, from seafloor vibration-producers to revamped airguns that produce less sound but equally good images.
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15 .Such choices might provide a little more peace and quiet in what's become a very noisy ocean
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16 .For Scientific American 60-Second Earth. I'm David Biello.
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