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The Gulf oil spill may have helped crack an air-pollution mystery, according to a new study. While the air pollution produced by the spill itself was regional and relatively small the secrets unlocked by studying it could have ramifications far beyond the Gulf. Much of the fresh oil that ended up on the Gulf of Mexico's surface evaporated into the atmosphere and got broken down by sunlight. But the evaporating oil also created tiny particles known as aerosols, which don't disappear so quickly. [Source: National Geographic News]
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