19 Disember 2012
- 11:5211:52, 19 Disember 2012 beza sjrh −988 Pencemaran tanih →Kesan pencemaran
- 11:5011:50, 19 Disember 2012 beza sjrh −27 Pencemaran air →Rujukan
- 11:4611:46, 19 Disember 2012 beza sjrh −1,955 Pencemaran udara →Lihat juga
- 11:4511:45, 19 Disember 2012 beza sjrh −3,413 Pencemaran udara →Kesan
- 11:4411:44, 19 Disember 2012 beza sjrh −644 Pencemaran udara →Hujan asid