| http://www.w3.org/ns/prov#value | - Many industries have used the gas in recent years as an alternative to perfluorocarbons, which also are potent greenhouse gases, because it was believed that no more than two percent of the nitrogen trifluoride used in these processes escaped into the atmosphere.The Scripps team analyzed air samples gathered during the past 30 years, including samples from the NASA-funded Advanced Global Atmospher
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