How many smoke stacks are there in the US?

The exact number of smokestacks in the U.S. is challenging to determine, as it varies with industrial changes and state regulations. However, estimates suggest there are tens of thousands of smokestacks across various sectors, including power plants, manufacturing facilities, and refineries. The number fluctuates due to factors like plant closures, new constructions, and updates in environmental policies. For precise figures, regulatory agencies like the EPA may provide data on emissions and sources.