31. Trade and other payables
| in PLN thousand | As at 31 December 2017 | As at 31 December 2016 |
| Trade payables due to related entities | 58 029 | 26 619 |
| Trade payables due to other entities | 14 573 | 35 219 |
| Tax, custom duties and social security payables | 26 885 | 26 329 |
| Payables due to tangible assets' acquisition | 41 410 | 46 930 |
| Environmental fees | 1 193 | 2 812 |
| Liabilities from property insurances | 3 339 | - |
| Grants | 6 593 | 6 841 |
| Other payables and accruals | 1 357 | 1 546 |
| 153 379 | 146 296 |
