MarketWatch: New research indicates a powerful greenhouse gas is at least four times more prevalent in the atmosphere than previously estimated. The research, based on data from a NASA-funded measurement network, examined nitrogen trifluoride, which is thousands of times more effective at warming the atmosphere than an equal mass of carbon dioxide. Using new analytical techniques, Ray Weiss of the Scripps Institution of Oceanography in La Jolla, Calif., led a team of researchers in making the …