NASA has signed separate agreements with the German Aerospace Center (DLR) and the National Research Council of Canada (NRC) to conduct a series of joint flight tests to study the atmospheric effects of emissions from jet engines burning alternative fuels. The Alternative Fuel Effects on Contrails and Cruise Emissions (ACCESS II) flights are set to.. ...
http://solarthermalmagazine.com/2014/04/10/nasa-signs-agreement-with-g
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