Space Data Centers: 1 Million Satellites Could Destroy…

Each Starlink satellite burns up in the atmosphere in less than five years, releasing a cocktail of soot, aluminum oxides and rare metals directly into the stratosphere. With 1 million satellite data centers to deploy, SpaceX is preparing an unprecedented ecological catastrophe. The Starmind project, dubbed AI1, aims to harness the near-limitless solar energy of low Earth orbit to power artificial intelligence calculations. But this technological ambition deliberately ignores its atmospheric consequences.

Soot, aluminum oxides, rare metals: the toxic cocktail of satellite reentries

The disintegration of satellites in the upper atmosphere injects pollutants directly into the stratosphere, between 15 and 50 kilometers in altitude. The soot from burning electronic components alters the Earth’s albedo and disrupts radiative balances. Aluminum oxides, produced by the vaporization of metal structures, react with stratospheric ozone through destructive catalytic mechanisms. The rare metals contained in processors and batteries (lithium, cobalt, rare earth elements) form toxic aerosols whose atmospheric residence time can span several years. Unlike tropospheric pollutants that fall back quickly, these stratospheric particles accumulate and circulate on a planetary scale.

3,500 launches per year: an unprecedented surge in space pollution

To place 1 million satellites into orbit, SpaceX would need approximately 3,500 launches per year for five years, i.e., nearly 10 takeoffs per day. Humanity conducted only 330 orbital launches in 2024. Each rocket launch releases massive quantities of carbon dioxide, water vapor and soot particles into the upper atmosphere. Valère Girardin, head of the European Space Agency’s propulsion future systems research group, confirms: “Back then, the environmental impact of rockets was the stroke of a pencil. But with the increase in launch cadence, ESA launched the Firewall project in 2019 to study their repercussions.” ABI Research projections anticipate 1,000 launches per year by 2035, multiplying the current pollution burden by ten.

Stratospheric aerosols: a fragile balance in a threatened atmosphere

The ozone layer, located between 20 and 40 kilometers above the surface, protects life on Earth from ultraviolet radiation. Metallic aerosols from atmospheric reentries disrupt this fragile chemical balance. Aluminum oxides catalyze ozone destruction through reaction cycles similar to those of chlorofluorocarbons (CFCs), now banned. Water vapor injected by liquid hydrogen rockets also fosters the formation of polar stratospheric clouds, accelerating depletion reactions. Scientists lack data to model these impacts precisely, as Valère Girardin admits: “We have models, but we lack data given the difficulty of collecting it in the upper atmosphere.”

A coalition of organizations (DarkSky International, PEER, Earthjustice) has filed a petition with the American Federal Communications Commission (FCC) asking for a moratorium on new megaconstellation licenses. The number of active satellites has multiplied by 150 in 25 years, rising from about 1,400 in 2015 to nearly 15,000 today. This accelerated industrialization of low-Earth orbit is turning the stratosphere into an environmental sacrifice zone. SpaceX acknowledges in its IPO prospectus that these infrastructures rest on “unproven technologies” that “may never become commercially viable.” The petition to the FCC calls for an immediate suspension of megaconstellation authorizations until comprehensive environmental impact studies are completed. American regulators have thus far ignored the atmospheric consequences of space industrialization, focusing only on technical and economic aspects.