In New York City, that orange-and-white striped tube with “smoke” (steam) coming out is called a steam stack (or steam chimney). Here’s what’s actually happening 👇 ⸻ 🔥 What NYC Is Doing NYC has a citywide underground steam system, one of the largest in the world, run by Consolidated Edison (Con Edison). The steam is used to: Heat buildings Power HVAC systems Sterilize hospitals Support some industrial processes ⸻ 🌫️ Why the Steam Stack Is Visible When underground steam pipes: Are vented Are b