To respond to the challenges of global energy shortages and climate change, we consolidate energy-saving proposals from all units to set relevant targets and action plans each year and periodically monitors and controls performance. Additionally, we promote production machinery assessments to drive energy efficiency improvements in plant facilities. Based on our energy-saving plan submitted to the Bureau of Energy, Ministry of Economic Affairs, the average energy-saving rate approved for our Taiwan Plant was 1.28%~2.13% in 2024. In line with the government’s promotion of renewable energy, we increased the installed capacity of solar panels at our Taiwan plant in 2020, reaching a cumulative capacity of 233 kWp by 2024, generating 321,322 kWh.
In 2024, total electricity consumption reached 88,138,011 kWh (88,138 MWh), with an electricity intensity of 7.353. The primary sources of electricity use were process power and air conditioning systems. Due to the full-scale production launch of the new etching plant in Taiwan and increased production capacity at the Suzhou plant, both total electricity consumption and intensity rose compared to 2023. Moving forward, we will continue to focus on improving energy efficiency, as well as planning and implementing the use of renewable and alternative energy sources.
In response to global sustainability trends and the government-promoted “Green and Sustainable Finance Action Plan,” the company has conducted internal assessments and classification procedures in accordance with the “Sustainable Economic Activities Recognition Guidelines” issued by the Financial Supervisory Commission. These assessments evaluate whether our business activities and products/services align with areas such as the low-carbon economy, circular economy, efficient use of resources, and pollution prevention.
To effectively lower energy consumption and GHG emissions, we actively promote various energy-saving measures. The focus is on improving the energy efficiency of plant facilities and production equipment, optimizing operational efficiency by adjusting production equipment parameters, and replacing traditional lighting with energy-efficient alternatives. We aim to achieve our environmental and energy-saving goals through initiatives across its plants. Additionally, we raise energy-saving awareness by encouraging employees to turn off lights when not in use and shut down computers after work. We also promote the widespread use of energy-efficient lighting and installs motion-sensor switches in areas with intermittent lighting needs to reduce energy waste by changing daily habits.
To fulfill our social responsibility, we voluntarily conduct an annual self-assessment and disclosure of our GHG emissions. To meet our own targets, we adopted ISO14064-1:2018 for our 2022 GHG inventory of Taiwan plant as a demonstration. GHG data were consolidated using the operational control approach and verified by a third-party assurance agency. In 2023, all subsidiaries completed the external assurance of their GHG inventories, and we have completed the external assurance of the Group’s GHG inventory.
We adopted external inventory under ISO14064-1:2018 for the first time at our Taiwan plant in 2022, while other sites implemented it in 2023.
Taiwan plant first implemented external verification of ISO 14064-1:2018 greenhouse gas inventory in 2022; the rest of the group initiated external verification of ISO 14064-1:2018 in 2023. For Taiwan, greenhouse gas emissions are calculated using the “Greenhouse Gas Emission Factors Management Table Version 6.0.4” announced by the Taiwan Environmental Protection Administration, the power emission factors published by the Energy Bureau of the Ministry of Economic Affairs, and the Environmental Protection Administration’s “Product Carbon Footprint Calculation Platform.”For China, emissions calculations refer to the “2006 IPCC National Greenhouse Gas Inventory Guidelines,” the “China Product Life Cycle Greenhouse Gas Emission Factor Database,” the “2022 National Power Carbon Emission Factor” published by China’s Ministry of Ecology and Environment, the Ecoinvent database, and the UK Department for Environment, Food and Rural Affairs (Defra) “Greenhouse Gas Reporting: Conversion Factors 2024” (hereafter “Defra 2024”). For Malaysia, emissions are calculated using “Defra 2024” and the grid emission factors published by the Malaysian Energy Commission. For Singapore, emissions are calculated using the grid emission factors published by the Singapore Energy Market Authority. The global warming potential (GWP) factors used are based on the IPCC Assessment Reports AR5 and AR6. No greenhouse gas emissions from perfluorinated compounds are reported across the entire group.
The primary source of greenhouse gas emissions for the CWTC Group comes from Scope 2 – purchased electricity. Therefore, we further analyzed the sources of electricity consumption within the Group’s facilities, which are mainly used for production processes. Other sources include air conditioning systems, air compressors equipment, wastewater treatment systems, lighting, and other equipment. We are committed to reducing energy consumption and improving energy efficiency in order to minimize greenhouse gas emissions generated during the production process.
The production processes of CWTC Group include electroplating, which generates air pollutants such as acidic and alkaline gases, as well as volatile organic compounds (VOCs). In response to these emissions, we strictly comply with environmental regulations applicable to the locations of each plant. We also regularly commission third-party organizations to conduct sampling and monitoring to ensure that exhaust concentrations meet regulatory emission standards.
Taking the Taiwan plant as an example, in addition to complying with the Ministry of Environment’s Air Pollution Control Act by appointing dedicated air pollution control personnel and deputies, and providing relevant training, the plant also uses wet scrubbers. Acidic and alkaline gases, along with VOCs, are collected from emission ducts and directed into scrubbers for neutralization and treatment before discharge. Relevant data is recorded and monitored daily to ensure emission control performance aligns with regulatory requirements.
In 2024, the total VOC emissions from the Taiwan plant amounted to 5.43 metric tons(Note). All production facilities within the Group met regulatory emission standards, with no major air pollution violations reported.
Beyond process-related emission controls, the Taiwan plant is also promoting behavioral change among employees. This includes offering incentives and subsidies for switching to electric scooters, encouraging the adoption of low-carbon transportation options to reduce emissions and pollution from commuting — demonstrating our commitment to fulfilling environmental responsibilities.
Note: Calculated using the mass balance method.