The AI buildout is the biggest infrastructure push as a share of GDP in nearly 200 years.

The AI buildout is the biggest infrastructure push as a share of GDP in nearly 200 years. It is running at 3.63% of GDP, bigger than the railroad boom, the interstate highways, or rural electrification.

Every buildout that size reshaped the economy. This one is financed with… pic.twitter.com/YSydGKV7XG

— Kurt S. Altrichter, CRPS® (@kurtsaltrichter) September 24, 2026

A Columbia/Brookings paper published Sept. 23 estimates that $8.2 trillion of AI-related infrastructure investment could be required globally over eight years. At its assumed pace, that’s roughly 2.8% of global GDP per year. The paper compares that scale with historic U.S. infrastructure waves: railroads averaged about 2.4% of GDP, interstate highways about 1.6%, electrification about 1.1%, and telecom/fiber about 0.8% during their respective buildouts.

https://business.columbia.edu/sites/default/files-efs/imce-uploads/svannieuwerburgh/papers/FinancingAIBuildout_03192026.pdf

Hundreds of planned data centers could multiply U.S. electricity demand

https://www.axios.com/2026/09/19/data-centers-how-much-power

Cleanview estimates 250 planned U.S. data centers could add more than seven times today’s roughly 13.2 GW of data-center capacity, although many proposed projects may never be built.

Meta’s $9 billion Alberta data center pulls more power investment behind it

https://www.reuters.com/legal/litigation/meta-data-center-boosts-alberta-appeal-hyperscalers-capital-power-says-2026-09-21/

More than 100 data-center projects have reportedly been proposed in Alberta, with power companies positioning themselves to supply the new load.