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On a typical day in August, the Moderate Resolution Imaging Spectroradiometers (MODIS) on NASA's Aqua and Terra satellites detect approximately 10,000 active fires, as well as huge swaths of freshly charred land in ecosystems ranging from boreal forests to savanna to tropical forests. In order to determine how much carbon dioxide and other pollutants all these fires contribute to the atmosphere in a given year, scientists have developed computer models that combine satellite observations of burned area and active fires together with information about vegetation, fuel loads, and other details. [Source: NASA Climate Change News]
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