I would love to see closed water loops and cooling towers in an earlier stage of the game in combination with coal plants.

Having cooling towers in mid game to make coal power plants more effective would make the midgame much more interesting and add some nice complexty without shifting too much ...

I am currently working on my first mod idea and i ran into several factorio related issues.

I want to make a building, that accepts resources and grants an global effect in return.

1. Which prototype can I use for my entity?
I think it needs an inventory?
2. How do i set the items my entity ...