Industrial Zone

Industrial Zone is a building zone which is needed by citizens to get their job/career, like commercial zones. They also produce the goods your city needs, which is why buildings in the industrial zone are factories and cause pollution.They have 2 extra zones which are poor industries,harbor(needs to touch water if you want boats and dock)and farms(need to be atleast 4x4).

Usage
Industrial Zone is needed for developing cities/towns as it is required by citizens to get their job/career.

Without an Industrial Zone towns/cities never grow well, resulting in town/city bankruptcy. Industrial Zone is also very helpful for production/distribution activities in the town/city.

Once the City/Town you build has reached 5,000 inhabitants, it's OK to reduce Industrial Zone, this zone can be replaced with non-polluting Commercial zone.(Though this is a bad idea still.)

Density
The number of workers in the Industrial Zone is dependent on

on it's density Dy, dense industrial can open up to 500 Employment,

The Maximum Capacity of an Industry is 837 Employment(According in the game file)