Quote:

NASA's first spacecraft named ORBITING CARBON OBSEVATORY, OCO-2 is dedicated to measuring carbon dioxide levels in Earth's atmosphere and is in final preparations for a July 1 launch from Vandenberg Air Force Base, California...
Currently, less than half the carbon dioxide emitted into Earth's atmosphere is by human activities...

Unquote:

Nature »  Environment  Planet Earth

co2carbonsatellitespaceobservationlaunchingatmosphereobservatory