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Barry Lefer, tropospheric composition program manager in the Earth Science Division of NASA’s Science Mission Directorate, at podium, answers a question during a briefing on NASA’s TEMPO (Tropospheric Emissions: Monitoring of Pollution) instrument along with Caroline Nowlan, atmospheric physicist at the Center for Astrophysics | Harvard & Smithsonian, left, Karen St. Germain, director of the Earth Science Division of NASA’s Science Mission Directorate, second from left, Laura Judd, associate program manager for the Applied Sciences Health and Air Quality Applications in the Applied Sciences Pr…