| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | lignin | Europe | Lignin, a key component of wood, is used in paper production and as biomass for energy in Europe. | 5 |
| 2 | lignin | forestry industry in North America | Lignin is a valuable component of wood used in the paper and wood product industries in North America's forestry industry. | 3 |