Over the first six months of 2025, SpaceX deliberately deorbited and incinerated 260 Starlink broadband satellites in Earth’s atmosphere, a routine disposal process that has renewed scrutiny of the environmental effects of large satellite constellations. Each of those satellites, which operate as orbital data centers providing internet service, weighs roughly 2,700 pounds, or about 1,225 kilograms. The company targets aging or malfunctioning units for controlled reentry, burning them up high above the planet.
The disposal releases metallic oxides and other pollutants into the upper atmosphere, and environmental scientists warn that incinerating thousands of such craft could deposit significant amounts of aluminum, copper, and other metals into a region where they may alter ozone chemistry and climate patterns.
A Growing Constellation’s Disposal Challenge
SpaceX, founded by Elon Musk in 2002 as Space Exploration Technologies Corp., originally set out to lower the cost of reaching orbit and eventually enable human settlement of Mars. After early failures nearly ended the effort, the company’s Falcon 1 rocket became the first privately built liquid-fueled vehicle to reach orbit.
SpaceX later developed the Falcon 9 rocket and Dragon spacecraft to serve NASA cargo missions to the International Space Station and pioneered the reuse of orbital-class rocket boosters. A satellite broadband unit called Starlink began operating in 2019 and quickly grew into a large constellation that now supplies most of the company’s revenue. Starlink delivers broadband internet from low Earth orbit to many countries and territories and also aims to extend mobile coverage across the globe.
As of June 2025, SpaceX had launched more than 6,000 Starlink satellites, and its long-term plans call for a constellation of up to 42,000 units. The sheer scale of the fleet means that routine disposal of aged or malfunctioning craft will continue at scale, making the fate of metallic debris a persistent environmental question.
Environmental Concerns Over Metal Deposits
The incineration of 260 satellites in six months — each weighing more than a compact car — introduces a significant quantity of metals into the upper atmosphere. Environmental scientists have raised concerns that aluminum, copper, and other materials from satellite burn-up could accumulate at altitudes where they interact with ozone chemistry, potentially affecting the protective ozone layer. Climate patterns also could be influenced if the particles alter radiative balance or serve as nuclei for cloud formation.
While the immediate mass of each satellite is modest, the cumulative effect of a planned constellation of up to 42,000 units, each eventually requiring disposal, represents an unprecedented anthropogenic input of metals into the stratosphere and mesosphere. Because a single company now operates a very large share of active satellites and plans far more, how regulators treat the environmental review of routine burn-up will shape atmospheric pollution and set a precedent for the coming expansion of orbital infrastructure.
Regulatory Battle Over Environmental Review
To accelerate its satellite replacement program, SpaceX is seeking a regulatory change from the Federal Communications Commission. The FCC is currently considering a proposal that would exempt Starlink satellites from certain environmental review regulations. Such an exemption would allow SpaceX to speed up the process of swapping out older satellites for newer ones, a step that could reduce the risk of uncontrolled reentries and improve system performance.
However, the proposal has drawn criticism from environmental groups and some members of Congress. They argue that the agency should conduct a thorough environmental impact assessment before granting any such waiver, given the potential for large-scale atmospheric pollution.
The FCC has not yet announced a decision on the proposed exemption. Environmental groups and some lawmakers continue to push for a full environmental impact statement before any regulatory changes are approved. The outcome of this regulatory battle will likely influence not only Starlink’s replacement cycle but also the approach other satellite operators take to deorbiting, as the orbital infrastructure around Earth expands rapidly in the coming years.
