Recycling is a way of permantly destroying your own building in return for half the resources used in it's construction and subsiquent upgrades. It is accessable from the "More..." button after clicking on a building.
There are currently only four buildings that cannot be recycled-Town hall, Under hall, Outpost, and Stronghold.
What buildings to recycle/not recycle
It's generally not recommended to recycle any buildings. However, it can be useful to recycle certain buildings in right situation.
Buildings to recycle:
- level 2+ Fortified Storage Silos (reason: with fortification silos become stronger, making catapulting buildings between or behind silos work without destroying the silos),
- Map Room (only when you are switching servers).
It is recommended NOT to recycle any other buildings. You can use general buildings for a NEC (A circle made of general buildings around your base).
- Recycle can only get back half of the resources that is used to upgrade or build the building.
- You can never recycle your town hall, it is impossible