3 July 2008
- 16:0916:09, 3 July 2008 diff hist −1 Biogas as fuel →Carbon dioxide
- 16:0916:09, 3 July 2008 diff hist −1 Category:Biogas →Carbon dioxide
- 16:0516:05, 3 July 2008 diff hist +1 Biogas as fuel →References and resources
- 16:0516:05, 3 July 2008 diff hist +1 Category:Biogas →References and resources
- 16:0516:05, 3 July 2008 diff hist +173 Biogas as fuel →References and resources
- 16:0516:05, 3 July 2008 diff hist +173 Category:Biogas →References and resources
- 16:0216:02, 3 July 2008 diff hist +106 Biogas as fuel →External links
- 16:0216:02, 3 July 2008 diff hist +106 Category:Biogas →External links