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After carbon dioxide and methane, nitrous oxide is the third-largest contributor of greenhouse-gas emissions to the atmosphere. Now scientists have developed a highly detailed model that simulates levels of nitrous oxide emissions in different regions and ecosystems of the world. They discovered nitrous oxide emissions decrease during El Niño, and increase during La Niña. The findings suggest a feedback mechanism in which nitrous oxide not only contributes to global warming, but may also be affected by climate patterns. [Source: MIT News]
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