Recycling buildings

[davemal]

How do you recycle buildings? I cannot find how it should be simple but dosn't appear to be.

[Kajsa_Kavat]

Recycling Silo and then Loading Docks. If you're already on the monorail levels, they get a small light on top, but I forgot what they're called.

[LaChouette]

It depends on the map. Given that you don't know how it works, I'm gonna assume you're on the first one.

You place the airship next to a river and the drone in that river, next to the airship.
You can place silos to remove buildings around them (the buildings go in the silo). Silos cannot remove other silos.
If you put loading docks on a river, the drone will go there and recycle everything around that dock, including silos.
The goal is to recycle everything, including silos, so you will need drone access everywhere, which means you might need to create more river.