A recent study warns that the rapid growth of satellite megaconstellations is introducing significant amounts of black carbon into the upper atmosphere. These soot particles from kerosene-fueled rockets can block sunlight and cool lower atmospheric layers, creating an unintended geoengineering effect. Researchers project that emissions from these constellations will account for nearly half of the space sector's total climate impact by 2029. While the current cooling effect is small compared to global warming, the lack of regulation for increasing launch frequencies poses a risk to the ozone layer and atmospheric stability.
