What changed
A Houston Advanced Research Center model warns that Texas’s data-center expansion could reverse decades of air-quality progress. If all planned projects connect to the grid and use the anticipated power mix, fine-particle pollution would more than triple, NOx emissions would rise 136%, and power-sector carbon dioxide emissions would climb 90% above 2025 levels within five years.
Texas already has 26 gigawatts of existing and under-construction data-center capacity. The state is also facing more proposed onsite-powered capacity than any other state.
Why it matters
This turns the data-center boom into an infrastructure choice with a visible public cost. The modeled soot level would be Texas’s highest since 2006, while NOx pollution would approach 2004 levels. In plain terms, the electricity strategy behind generative AI could make the air dirtier even as other sectors have spent decades cutting emissions.
The outcome is not fixed. Some proposed projects may never be built, and developers can sharply reduce pollution by pairing grid power with onsite solar and wind. The model found that NOx emissions could be up to 10 times lower on that path.
The risk runs the other way when speed becomes the priority. Developers considering onsite gas engines to avoid long grid-connection waits could produce the highest-pollution outcome, especially where less-efficient gas turbines are used to get facilities running faster.
The useful reading is that data-center capacity is not just a construction race. It is also a decision about who supplies the power, which technology gets built under deadline pressure, and whether the environmental cost of AI infrastructure is paid through cleaner generation or dirtier air.
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