https://motherboard.vice.com/en_us/article/43azqm/nasa-orbiting-carbon-observatory-nature-environment-emissions-climate-change-trump

Human activities, like fossil fuel consumption and widespread deforestation, are contributing to climate change by disrupting the global carbon cycle. To better understand these anthropogenic impacts on the planet, NASA launched the Orbiting Carbon Observatory-2 (OCO-2) on July 2, 2014, to follow up on its original OCO satellite, which was lost in a 2009 liftoff failure.

For the past three years, OCO-2 has collected almost a million "soundings" (atmospheric measurements) every day, from its Sun-synchronous orbit 438 miles (705 kilometers) above the planet's surface.