Source: Chemical & Engineering News, 11/18/25
As more rockets and satellites in low Earth orbit burn up in the atmosphere at the end of their lives, the amount of introduced vapors and particulate matter there is dramatically rising. A new study under review in Advances in Space Research calculates just how much waste this traffic is injecting into Earth’s upper atmosphere. The results show that last year, the mass of metals introduced to the atmosphere by human activity annually nearly doubled from the levels seen from 2015 to 2020. For 24 different elements, this influx now contributes more mass than natural sources. Both records are on track to be shattered this year.