| 41. | The number of oceanic dead zones near inhabited coastlines are increasing.
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| 42. | Most people attribute the dead zone solely to nitrate loading in the Mississippi.
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| 43. | Nitrogen from crop fertilizer is thought to be the dead zone's prime culprit.
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| 44. | Pulse width also determines the dead zone at close ranges.
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| 45. | Unfortunately, dead zones rarely recover and usually grow in size.
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| 46. | However, the emergence of unexplained dead zones in the lake has raised new worries.
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| 47. | But there shouldn't be any dead zone at all ."
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| 48. | Despite the evidence, scientists remain reluctant to blame the dead zone entirely on farmers.
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| 49. | Rabalais, 52, admits that " dead zone " may mislead.
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| 50. | Bono was turning the red zone into the dead zone.
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