| 1 | It contains a lot of tryptophan, manganese, iron, protein and selenium. | |
| 2 | The Environmental Protection Agency does not regulate manganese under the Safe Drinking Water Act. | |
| 3 | That means you might have trouble finding a filter that specifically targets manganese. | |
| 4 | The fumes produced by welding metal often contain small amounts of manganese. | |
| 5 | The ISBA has adopted two regulations on the exploration and development of manganese nodules. |