| 2005 | 2006 | 2007 | |
|---|---|---|---|
| Emissions to air - Respirable dust (t/year) | 1,600 | 600 | 500 |
| Emissions to air - SO2 (t/year) | 3,500 | 2,500 | 2,300 |
| Emissions to air - NOx (t/year) | 5,100 | 4,900 | 5,000 |
| Emissions to air - N2O (t/year) | 13,700 | 12,200 | 10,100 |
| Emissions to air - Volatile Organic Compounds (t/y | 9,300 | 9,700 | 8,900 |
| Emissons to water - COD (t/year) | 21,200 | 19,400 | 10,600 |
| Energy use (in TJ) | 75,000 | 74,000 | 76,000 |
| Landfilled non-hazardous waste (t/year) | 64,500 | 48,900 | 46,500 |
| Landfillled hazardous waste (t/year) | 375 | 592 | 600 |