| Year | GHG Emission Verification | Period | Statement |
| 2024 | ISO 14064-1:2018 Greenhouse Gases | 2024/1/1 – 2024/12/31 |  |
| 2023 | ISO 14064-1:2018 Greenhouse Gases | 2023/1/1 – 2023/12/31 | |
| 2022 | ISO 14064-1:2018 Greenhouse Gases | 2022/1/1 – 2022/12/31 | |
| 2021 | ISO 14064-1:2018 Greenhouse Gases | 2021/1/1 – 2021/12/31 | |
| Year | Other Verification | Statement |
| 2024-2027 | ISO 45001:2018 Occupational Health and Safety Management Systems | |
| 2022 | ISO 14067:2018 Product Carbon Footprint Standard | |
| 2022 | ISO 14040:2006 & 14044:2006 Life Cycle Assessment | |
