| Giver | Post | Date |
| ytmtbr | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 22-Nov-2021 |
| hrishi760 | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 28-Mar-2021 |
| United09 | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 09-Sep-2020 |
| AbhishekDhanraJ72 | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 07-Aug-2020 |
| Vitz | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 07-Jul-2020 |
| mkrolikowski | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 18-Nov-2019 |
| HChoi | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 21-Jul-2019 |
| TrangTruong93 | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 28-Jan-2019 |
| Mahesh41285 | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 28-Nov-2018 |
| shashanki | Re: Sulfur dioxide, a major contributor to acid rain, is an especially ser | 22-Aug-2018 |
