Table 4.
Data compilation methods and main data sources distinguished along processing stages. References for all data sources will be listed in Section 6 below. mass-bal.= mass-balancing of previous flows; zero= no data available, assumed zero; estimate= estimation/gap-filling.
| Material | Input flow data to processing stages |
|||||
|---|---|---|---|---|---|---|
| (2) Raw products |
(3) Semi-finished products |
(4) Final products |
||||
| Production | Trade | Production | Trade | Production | Trade | |
| Cement | Cembureau | Cembureau | mass-bal. | Comtrade | mass-bal. | zero |
| Bitumen | IEA, UNICPS | IEA | mass-bal. | zero | mass-bal. | zero |
| Bricks | UNICPS | Comtrade | mass-bal. | zero | mass-bal. | zero |
| Paper | FAO | FAO | FAO | zero | mass-bal. | Comtrade |
| Wood | FAO | FAO | FAO | zero | mass-bal. | Comtrade |
| iron & steel | WSA, [97] | Comtrade | mass-bal. | Comtrade | mass-bal. | Comtrade |
| aluminium | WBMS, BGS | Comtrade, BGS | mass-bal. | Comtrade | mass-bal. | Comtrade |
| Copper | WBMS, BGS | Comtrade, BGS | mass-bal. | Comtrade | mass-bal. | Comtrade |
| Lead | BGS | Comtrade, BGS | mass-bal. | Comtrade | mass-bal. | Comtrade |
| Zinc | BGS | Comtrade, BGS | mass-bal. | Comtrade | mass-bal. | Comtrade |
| Other metals | BGS | BGS | mass-bal. | zero | mass-bal. | zero |
| Plastics | IEA | Comtrade | UNICPS | Comtrade | mass-bal. | Comtrade |
| Container glass | UNICPS, glassgobal | Comtrade | mass-bal. | Comtrade | mass-bal. | zero |
| Flat glass | UNICPS, glassgobal | Comtrade | mass-bal. | Comtrade | mass-bal. | zero |
| Sand & gravel | estimate | zero | mass-bal. | zero | mass-bal. | zero |