| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | lignin | forestry industry in North America | Lignin is a valuable co-product in the production of paper and wood products, and plays a significant role in the forestry industry in North America. | 1 |
| 2 | lignin | forestry industry in North America | Lignin is an important component of wood and is crucial for the paper-making process in North America. | 1 |
| 3 | lignin | forestry industry in North America | Lignin is a valuable component of wood with potential applications in paper and wood product industries. | 1 |