Environmental Sustainability

Total Emissions In Comparison – Kezhong, Keyan, the US Office (2023 vs 2024)

In 2024, the total GHG emissions for Kezhong, Keyan, and the US Office decreased by approximately 2,723.4303 metric tons of CO₂e, representing a 13.93% reduction compared to 2023.

The primary driver of the overall emissions reduction was the significant decrease in Category 3.1. Specifically, the emissions dropped from approximately 7,092 metric tons of CO₂e in 2023 to 3,587 metric tons of CO₂e in 2024. Category 3.1 refers to transportation-related emissions from the company’s direct imports of raw materials.

Proportion of Direct GHG Emissions – Kezhong, Keyan, US Office (Category 1)

In 2024, the total direct (Category 1) GHG emissions from Kezhong (including dormitory), Keyan, and the US Office amounted to 459.2641 metric tons of CO₂e, accounting for 2.73% of the total emissions.

Category 2 Greenhouse Gas Emissions Proportion by Site: Kezhong, Keyan, Songjiang, Kunshan, and U.S. Office in 2024

In 2024, the energy indirect GHG emissions (Category 2) from Kezhong (including dormitories), Keyan, and the U.S. Office amounted to 6,423.3807 metric tons of CO₂e, accounting for 38.15% of the Group’s total emissions. The main source of indirect emissions is purchased electricity. Both Kezhong and Keyan procure electricity from Taiwan Power Company, while the U.S. Office purchases electricity from Pacific Gas and Electric Company (PG&E).
This version of the Sustainability Report is issued in August 2025. As the Songjiang and Kunshan sites are scheduled to complete third-party verification of their GHG inventories under ISO 14064 in Q4 2025, relevant data will be disclosed in next year’s Sustainability Report.
As shown in the table on the right, Category 2 (Scope 2) emissions from two China sites (Songjiang + Kunshan) account for 71.82%, while Category 2 emissions from Taiwan sites and the U.S. Office account for only 28.18%. This indicates that the majority of the Group’s electricity-related carbon emissions are concentrated in its China-based facilities.

2023 vs 2024 各廠區用電排放比較

From 2023 to 2024, Category 2 emissions increased by approximately 15.65%, equivalent to an increase of 3,084.72 metric tons of CO₂e.

Among all sites, only the Kezhong site showed a slight decrease in emissions, while all other facility sites experienced an upward trend in both electricity consumption and emissions. The primary reason for the increase is the overall growth in electricity usage and production output across the sites in 2024. The data indicate a positive correlation between electricity consumption and production volume.

Kezhong site

↓ 342.932 tCO₂e

Keyan site

↑ 906.64 tCO₂e

US Office

↑ 0.5228 tCO₂e

Songjiang site

↑ 1,140.5043 tCO₂e

Kunshan site

↑ 1,379.9912 tCO₂e

Category 3: Upstream Transportation

↓ 49.42%

Category 5: Downstream Leased Assets

↓ 11.18%

Category 4: Upstream Emissions from Purchased Goods

↑ 13.87%