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NASA mission will study Earth's 'breathing' from space
Scientists know that the Earth "breathes" carbon, particularly through plants that absorb carbon through photosynthesis when they're healthy and give it up when they lose their leaves or die. They haven't had an extremely detailed look at that breathing cycle, however, which is where NASA and the University of Oklahoma come into play. They're launching a satellite mission, the Geostationary Carbon Cycle Observatory, that will both study plant health as well as the exchange of key gases (carbon dioxide, carbon monoxide and methane) between the land and the atmosphere.
