Environmental Sustainability｜Greenhouse Gas Emission
Nuvoton actively reduce the environmental impact of our business operations by investing in innovative technologies and initiating layouts for renewable energy and net carbon zero emissions. We enhance resource use efficiency and implement waste management to respond to the continuously evolving international environmental regulations, extreme climate events, and other risks. By estimating financial impacts and planning management costs in advance, we formulate environmental strategies and build operational resilience for the company.
48.8
％
Approved SBTi Near-Term Target: Commitment to Reduce Scope 1 and 2 Emissions by 2030 Compared to the 2022 Baseline
25
%
Approved SBTi Near-Term Target: Commitment to Reduce Scope 3 Emissions by 2030 Compared to the 2023 Baseline
1163000
kWh
Nuvoton Taiwan's Annual Electricity Saving Achievement in 2024
Greenhouse Gas Management
Since 2009, NTC has established a greenhouse gas inventory mechanism by following ISO 14064-1 greenhouse gas inventory standards and the "Guidelines for Greenhouse Gas Emission Verification and Registration" issued by the Environmental Protection Administration. The company regularly inventories Scope 1 and Scope 2 emissions within the wafer fab and obtains verification from third-party verification agencies.In 2023, Nuvoton implemented a number of measures to reduce greenhouse gas emissions in 2024 . Consequently, according to third-party verification, the total Scope 1 and Scope 2 greenhouse gas emissions for Nuvoton in 2024 were 123,527 t-CO2e, a reduction of 25,586 t-CO2e (17.2%) compared to 2023. The total Scope 1 emissions in 2024 were 38,518 t-CO2e; the total Scope 2 emissions were 85,009 t-CO2e; the total Scope 3 emissions were 578,604 t-CO2e.
Scope 3 Emission Sources by Category in 2024
Nuvoton(Global) Net Carbon Zero Path Diagram
Nuvoton Taiwan Net Carbon Zero Path Diagram
Nuvoton Japan Net Carbon Zero Path Diagram
1 This figure includes the emissions and estimates of Nuvoton and all its subsidiaries as reported in the consolidated financial statements.
2 The values for period from 2025 to 2050 is an estimate.
3 Greenhouse gas emissions are calculated using the operational control approach, and the calculation method is activity data * emission coefficient * GWP value. The emission coefficient of Nuvoton Taiwan refers to the emission coefficient announced by the Ministry of Environment of Taiwan in 2024, and the GWP value refers to IPCC AR5 (2013); Nuvoton Japan's emission coefficient refers to 2013 IPCC Guidelines for National Greenhouse Gas Inventories, the GWP value from 2021 to 2023 refers to the IPCC AR5 (2013), and the GWP value in 2024 refers to the IPCC AR6 (2021).
Based on the fact that emissions from the process gases generated by NTC account for more than 90% of the carbon emissions in Scope 1, the reduction of greenhouse gas emissions from the processes has been set as the primary reduction target. The main reduction strategy has evolved from initially optimizing processes by replacing process gases to the current approach of installing fluorinated gas reduction equipment at the process end, while also improving the processing efficiency of the reduction equipment and gradually increasing its quantity each year.
NTC's Greenhouse Gas Reduction Project.
| Category | Initiative | Energy Red. Target (k kWh/yr) | GHG Red. Target (tCO2e/yr) | Actual GHG Red. (tCO2e/yr) | Comp. | Description |
|---|---|---|---|---|---|---|
| Scope 1 Reduction | Scrubbers installation | - | 10,521 | 11,165 | 100% | Scope 1: -17%/year |
| Energy-saving Equipment | High-Efficiency Equipment (pump, chiller, LED, HVAC, etc.) | 620 | 306 | 199 | 100% | Replacement of outdated equipment in various facilities |
| Energy-saving Equipment | Chiller #4 upgrade and replacement | 520 | 256 | 0 | 80% | Expected completion Q1 2025 |
| Process Optimization | Chiller System (Al Control) | 200 | 99 | 99 | 100% | Al software completed, online in Dec. |
| Alternative Energy | Replacement of Electric Boilers with NG Boilers | 150 | 74 | 109 | 100% | Online in Dec. (-220 kWh/year) |
| Sub-total | 1,490 | 11,256 | 11,572 | 103% |
Since 2023, NTCJ has been conducting third-party verification in accordance with the ISO 14064-1 standard, similar to Taiwan, and has obtained a verification statement to ensure the credibility and quality of the inventory data and reports. From 2023 to early 2024, NTCJ will conduct carbon emission surveys of suppliers in preparation for ISO 14064-1 certification in 2024.
NTCJ's Greenhouse Gas Reduction Project.
| Category | Initiative | Energy Red. Target (k kWh/yr) | GHG Red. Target (tCO2e/yr) | Actual GHG Red. (tCO2e/yr) | Comp. | Description |
|---|---|---|---|---|---|---|
| Cogeneration | high-efficiency heat exchangers | - | 2,982 | 3,000 | 100% | Equipment Upgrade at Nagaokakyo Cogeneration Plant |
| Energy-saving Equipment | Replacement to LED | 1,020 | 448 | 509 | 100% | |
| Energy-saving Equipment | High-Efficiency Equipment (pump, chiller, AHU etc.) | 410 | 196 | 196 | 100% | 53 improvements |
| Renewable Energy | Off-site PPA | - | 3,657 | 0 | 0 | Arai Plant scheduled for implementation in 2025 |
| Alternative Energy | Purchase of non-fossil fuel certificates | - | 2,225 | 2,225 | 100% | Done |
| Sub-total | 1,430 | 9,508 | 5,930 | 62% |