Space Junk Could Re-Enter the Atmosphere in Busy Flight Areas

SLS could launch a Titan balloon mission | Boeing engineers proposed a design akin to a "traditional blimp" filled with helium and two ballast tanks, equipped with RADAR/LIDAR systems and atmospheric sensors. The team expects such a balloon to last in Titan's atmosphere for years.

How much did SpaceX's Starship Flight 7 explosion pollute the atmosphere?

How does the atmosphere affect ocean weather? - EurekAlert