The buildup of carbon dioxide in the atmosphere is the main greenhouse gas driving global warming and the benchmark indicator for global climate change. In summer 2014, a major new satellite – NASA’s Orbiting Carbon Observatory-2 mission – will launch into space with the goal of measuring this carbon dioxide. We spoke to the mission’s Deputy Project Scientist, Dr. Annmarie Eldering, to learn more. Based at NASA's Jet Propulsion Laboratory, she’s an expert in detecting heat-trapping greenhouse gases from space.