GHG & Energy Management
We addresses climate and GHG reduction goals through energy efficiency measures and energy management systems. Regular GHG inventories and reduction programs help mitigate climate risks.
2024 Execution Results
Power Saving
GHG Emission Intensity
(tCO2e per million NT$ output)
Energy Intensity
(GJ/million production value)
Plants I-III initiated ISO 50001 implementation in 2022 and obtained certification in 2023. By 2024, Plants I-IV and Trend Tone Imaging, Inc. had all been certified, supported by training and knowledge-sharing initiatives to improve energy performance and strengthen risk management.
▍Energy Management & Consumption Analysis
In 2024, total energy consumption across plant sites reached approximately 556.31×103 GJ, a year-on-year increase of 11.6% (57.98×103 GJ), mainly due to a 12.3% rise in production capacity. Purchased electricity accounted for 51% of the total. Compared to 2023, electricity, diesel, natural gas, and steam consumption increased by 4%, 2%, 29%, and 12%, respectively.
To expand renewable energy use, Plant II’s solar PV system received self-consumption approval on Mar 1, 2023, with an investment of NT$21.4 million. By the end of 2024, renewable energy accounted for 0.24% of total use, generating 374,414 kWh (1.35×103 GJ) for on-site consumption.
(Unit: 10³ GJ) 【Note 2】
Note 1: Environmental indicator data are based on factory sites.
Note 2: Unit for purchased energy: 103 GJ.
Note 3: Calorific values follow the latest Energy Administration guidelines (e.g., electricity: 860 kcal/kWh; natural gas: 8,000 kcal/m3).
Note 4: Energy consumption (GJ) = [Energy consumption (unit) × Calorific value (kcal/unit) × Conversion factor (4.187 × 103 joules (J)/kcal)] ÷ 109.
Note 5: Figures are rounded to two decimal places.
In 2024, energy intensity rose to 71 GJ per million NT$ of production value, a 4.4% increase from 68 GJ in 2023, reflecting higher energy use aligned with increased production output.
▍GHG Emissions & Carbon Management
In 2023, the Board approved the Group’s 2030 carbon reduction target, using 2021 as the base year. Accordingly, the reporting period now begins in 2021 for consistency. This report adopts IPCC AR6 GWP values and corrects the previously misapplied electricity emission factor for Everlight (Suzhou) Advanced Chemicals Ltd., replacing the regional baseline with China’s national average factor. The emission boundary was also expanded to include RTO treatment stages for greater data completeness.
In 2024, GHG emissions intensity decreased slightly by 0.6% to 8.92 tCO2e per million NT$, while total emissions rose 7.6% to 70,301 tCO2e due to increased production. Despite this, intensity continued to decline. The Company remains committed to carbon reduction through equipment upgrades and ongoing process improvements.
▍Energy Conservation & Carbon Reduction Achievements
We have successfully reduced GHG emissions and improved energy efficiency, enhancing overall performance and contributing to sustainable development goals.
★ Special Report
Climate Action & Energy Management
To address climate change risks, policy trends, emerging technologies, and carbon pricing, the Company proactively manages climate-related challenges and opportunities. In alignment with Taiwan’s 2030 national reduction target announced in 2022, the Group aims to cut carbon emissions by 25% by 2030, while supporting global efforts toward net-zero emissions by 2050 through enhanced climate disclosures and carbon reduction initiatives.
Climate Action & Energy Management Measures
The Company has optimized production processes and equipment, adopted ISO 50001 for energy management, and follows ISO 14064-1 to implement ongoing GHG reduction efforts. Actions include using energy-efficient equipment, systematizing energy management, and investing in renewable energy to reduce reliance on conventional sources.
Energy Conservation & Carbon Reduction Results
Since 2021, the Company has pursued energy-saving and carbon reduction projects, meeting the annual electricity savings target of ≥1%. In 2024, initiatives saved 2.135 million kWh, cut emissions by 1,054 tCO2e (equal to the carbon absorbed by 87,833 trees), and saved about 7,689 GJ in energy – a 3.2% electricity saving rate. Of 20 planned high-energy equipment replacements, 16 were completed, saving 158,000 kWh and reducing 77 tCO2e.
Note 1: Calculations are based on the 2023 electricity emission factor (0.494 kgCO2e/kWh) and 2022 Energy Statistics Handbook.
Note 2: Based on data from the Environmental Quality Protection Foundation, one tree absorbs approximately 12 kgCO2e per year. Thus, a reduction of 1,054 tCO2e is equivalent to the annual absorption of about 87,833 trees.
▍Ozone-Depleting Substances (ODS) Emissions
We have gradually reduced the use of ozone-depleting substances (ODS), especially R22. In 2024, usage dropped to 0.09 metric tons, down from 0.2 metric tons in 2023.
▍GHG & Energy Management Performance
To enhance GHG inventory and energy management, the Company’s plants have adopted three key indicators: (1) Electricity Savings (%), (2) GHG Emissions Intensity (tCO2e/million NT$), and (3) Energy Intensity (GJ/million NT$). In 2024, sites continued carbon reduction efforts aligned with the 2025 mid-term net-zero target. Despite higher energy use, emissions declined and efficiency improved through process optimization, equipment upgrades, and energy management systems. The Company remains committed to a 25% emissions reduction by 2030 and the 2050 net-zero goal.
