Space Junk Does Not Decompose

Junk in space is non-biodegradable.
“Debris (trash) from previous space missions can also damage spacecraft,” says NASA. Space debris is of such a concern that NASA established the Orbital Debris Program Office.
“The NASA Orbital Debris Program Office, located at the Johnson Space Center, is the lead NASA center for orbital debris research. It is [...]

Orbiting Carbon Observatory

from NASA
The Orbital Sciences Taurus XL rocket set to launch NASA’s Orbiting Carbon Observatory is in place at Launch Complex 576-E at Vandenberg Air Force Base in California. Liftoff is scheduled for Feb. 24 at 1:51:30 a.m. PST (4:51:30 a.m. EST).
The OCO is a new Earth-orbiting mission sponsored by NASA’s Earth System Science Pathfinder Program. [...]