Scrap
From Project Rebearth
Scrap is a rare resource that cannot be produced by any building. It is obtained exclusively through Expeditions and trading, and is used as a construction material for building upgrades and advanced ships.
Production
No building in the game produces 
Scrap. Unlike other resources, there is no production chain or building that generates it. This makes Scrap one of the most limited resources available, obtainable only through Expeditions and trading.
Consumption
Scrap is not consumed as an ongoing rate by any building. Instead, it is required as a one-time construction cost for upgraded buildings and advanced ships.
Building Upgrades
The following buildings require Scrap to upgrade from their base version:
| Building | Scrap Cost |
Upgrades From |
|---|---|---|
| Improved Windmill | 100 | Windmill |
| Improved Stone Crane | 100 | Stone Crane |
| Improved Clay Crane | 100 | Clay Crane |
| Improved Iron Mine | 100 | Iron Mine |
Ship Construction
Advanced ships require Scrap as part of their construction cost:
| Ship | Scrap Cost |
 Wood Cost
|
|---|---|---|
| Medium Ship | 10 | 4,000 |
| Large Ship | 100 | 8,000 |
Storage
Scrap is stored alongside other resources in general-purpose storage buildings.
| Building | Volume | Notes |
|---|---|---|
| Center | 5,000 | Stores all resources |
| Square | 10,000 | Upgrade from Center; stores all resources |
| Warehouse | 5,000 | Stores all resources |
Other Sources
Expeditions
Expeditions are the primary source of Scrap. Each expedition yields 3 Scrap per 1,000 hectares of territory explored, along with 15 of a random basic resource ( Wood, 
Stone, 
Earth, or 
Glass) per 1,000 hectares. See Expeditions for detailed costs and rates.
Trade
Scrap can be bought and sold through the Trade system. The Market provides a trade capacity of 1,000 units, while the Port increases this to 5,000 units.
Affected By
Because Scrap cannot be produced by any building, standard production modifiers have no effect on its availability. The following choices and alliance types indirectly affect how Scrap is obtained:
| Source | Effect | Multiplier | Description |
|---|---|---|---|
| Science League | Expedition cost | ×0.8 | Reduces the cost of Expeditions, making Scrap cheaper to obtain
|
| Trade Alliance | Trade costs | ×0.9 (export and import) | Reduces both export and import trade costs |
| Export Focus | Trade costs | ×0.85 export, ×1.2 import | Reduces export costs but increases import costs |
| Import Focus | Trade costs | ×0.85 import, ×1.2 export | Reduces import costs but increases export costs |
