Where Did Fog go?

Hi, I took a break. Last time I worked on unity was 3.5 and fog was found in the render settings under the “Edit” menu. It’s not there anymore. Where are the fog setting for unity 5?

I searched the manual and found the global fog script. How do I use that script? Do I drag it on the main camera or do I create an empty game object and place it on there?

found it under the window menu.
window → lighting.

So, what is that global fog script for? Is it an improved fog rendering system?