GHG Management System

In 2008, Chunghwa Telecom took a leading role in the industry by conducting a greenhouse gas (GHG) inventory covering 100% of our operational sites. We used the Greenhouse Gas Protocol developed by the World Resources Institute (WRI) and the World Business Council for Sustainable Development (WBCSD) as the inventory tool to establish a GHG emissions inventory. We obtained a verification statement from a third-party verifier (SGS-Taiwan), becoming the first telecommunications company in Taiwan to obtain ISO 14064-1 verification.

Greenhouse Gas (GHG) Emissions

The total greenhouse gas (GHG) emissions by CHT in 2025 is 2,303,470.748 t-CO₂e, which include CO₂、CH₄、N₂O、HFCs、PFCs、SF₆、NF₃. We did not emit PFCs, SF₆, and NF₃; therefore, the values thereof are 0.

The primary energy source for CHT operation is electricity. The GHG emissions mainly fall in the Scope 2 (purchased electricity), accounting for 96.94%
The Scope 1 accounting for 3.06 % only. There was a slight decrease in the total emissions in 2025, dropped by 24.49 % compared with 2020 levels, thanks to implementation of various energy efficiency and carbon reduction measures.
Scope 3 (Categories 3-6): 1,706,690.1409 t-CO₂e; total GHG emissions of Scope 1, 2, and 3 (Categories 1-6): 2,303,470.748 t-CO₂e

Scope 1 and 2 Emissions

	2020	2021	2022	2023	2024	2025
Direct Emissions （Scope 1）（t-CO₂e）	22,192.9316	17,887.4700	19,185.3151	18,874.8892	20,315.1166	18,253.1898
Indirect Emissions（Scope 2）（t-CO₂e）	768,128.0670	716,979.2586	694,912.7210	645,490.6474	604,979.4866	578,527.4177
Total Emissions（Scope 1 + Scope ）（t-CO₂e）	790,320.9986	734,866.7286	714,098.0361	664,365.5366	625,294.6032	596,780.6075
Emission Intensity（t-CO₂e/million NTD）	4.42	4.11	3.92	3.52	3.24	3.02
Coverage as percentage in revenue（%）	100	100	100	100	100	100

Notes：
1. An emission target of 19,000 metric tons was set for Scope 1 of 2025.
2. The Scope 2 emissions in the table above are calculated using a market-based approach.
3. The increase in Scope 1 emissions in 2024 is due to multiple typhoon repairs requiring increased fuel usage and routine refrigerant replenishment. Since the primary energy used in the telecommunications industry is electricity, the majority of greenhouse gas emissions come from Scope 2 purchased electricity. Therefore, our company will focus its carbon reduction efforts on Scope 2.
4. The data coverage is 100% of the group-wide operations and group-wide revenues.

Scope 2 Emissions

Unit:t-CO₂e

	2020	2021	2022	2023	2024	2025	Target for 2025
Location-base	768,128.0670	716,979.2586	694,912.7210	681,871.5699	639,393.9116	620,691.6600	625,274.1576
Market-base	768,128.0670	716,979.2586	694,912.7210	645,490.6474	604,979.4866	578,527.4177	588,776.1576

Note: The data coverage is 100% of the group-wide operations and group-wide revenues.

Scope 3 Emissions

In 2025, In line with ISO 14064-1:2018 and with reference to the GHG Protocol Corporate Value Chain (Scope 3), Chunghwa Telecom investigated the 15 GHG emissions from the related business activities in the upstream and downstream to inventory the Scope 3, 4, and 5, and the verification statement was obtained from Crowe (TW) CPAs.

Scope 3 emissions	2021	2022	2023	2024	2025
Total Emissions( t-CO₂e )	1,913,245.9918※	1,828,060.8890	1,814,662.2596	1,765,032.1202	1,706,690.1409
Categories Accounted	15	15	15	15	15

※Note: In accordance with the SBTi review committee's feedback, the contents under 'Category 3.14 – Franchises' were reclassified under 'Category 3.15 – Investments', and the calculations were revised accordingly

2025 Scope 3 Emission

Operations Value Chain	Category	Description	Emissions（t-CO₂e）
Operations Value Chain	Category	Description	Upstream	3	Upstream transportation and distribution	358.0994
Downstream transportation and distribution	19.7993
Business travel	5,040.0971
Employee commuting	10,195.0800
4	Purchased goods and services	620,227.1056
	Capital goods	498,065.5156
	Fuel- and energy-related activities	138,879.9299
	Waste generated in operations	1,004.5747
	Upstream leased assets	85,591.2483
Downstream	5	Use of sold products	91,233.0922
		End-of-life treatment of sold products	384.2152
		Downstream leased assets	209,329.3554
		Processing of sold products	N／A
		Franchises	N／A
		Investments	46,362.0282

Notes:
1. This table presents the emissions of each category based on the verification statement issued by the third party.
2. In 2025, the emission target was set at 1.7103692133 million metric tons by Chunghwa Telecom.

Energy Saving and Carbon Reduction Plan and Results

To cope with the climate change risks and introduce more benefits from energy saving and carbon reduction, Chunghwa Telecom formulated tangible energy saving and carbon reduction action plans. In addition to active energy efficiency improvement, through autonomous environmental measures and practices, it compiles and analyzes energy data for a science-based management.

Item	Description
Energy Efficiency Improvement	Consolidation of IDC spaces for an effective utilization Adoption of high-efficiency and energy-saving equipment to elevate the energy efficiency of IDCs Reduction of the PUE of IDCs from 1.67 in the base year of 2020 annually to the target of a PUE of 1.50 or lower by 2030 Green building materials adopted for newly constructed IDCs or hostels Recovery systems for rainwater, groundwater, and HVAC condensate installed for water resource recycling Lighting of public areas in office buildings replaced with LED lights
Green Energy Introduction	Installation of solar photovoltaic and wind power systems, with a cumulative installed capacity of approximately 13MWp by 2025 91,067 Taiwan Renewable Energy Certificates (T-RECs) obtained in 2025
Telecom Facility Energy-Saving Plan	Stipulation of energy efficiency specs for equipment: stipulation of energy efficiency specs for the equipment necessary for telecom services in the procurement specifications Energy-saving measures for telecom facilities: adjustment to equipment capacity as appropriate and equipment integration to reduce the overall power consumption of telecom facilities Base station energy-saving: procurement of base stations with higher energy efficiency to replace the energy-demanding counterparts Equipment replacement: Active introduction of NGN equipment to replace the old PSTN equipment and cut energy consumption
Autonomous Environmental Protection	Phase-out of old vehicles with newly procured energy efficient green vehicles; introduction of electric vehicles Assistance in establishment of YouBike Station at the Xinyi-Hangzhou intersection Clean Homeland, Energy Efficient Offices, Car-free Day, Office Document Automation System (ODAS) Energy Efficiency Service: to assist the SMEs and the vulnerable groups in energy efficiency improvement Industrial waste recycling target setting
Value-added Products & Services	First-and-only in the industry: Carbon neutral Syntrend Store with EPA Carbon Label for Services as well as certifications to ISO 14067. The MOD set-top box 504 A/B, Hami Video service, in-store counter service, 5G mobile internet, HiNet internet (including fiber optic circuits), and fixed-line telephone services have obtained ISO 14067 carbon footprint certification, with Hami Video additionally receiving the Ministry of Environment's carbon label and PAS 2060 and PAS 2060 E-bill: promoted along with business marketing for environmental protection and carbon reduction E-invoice: invoices stored in the cloud permanently that saves materials and labor, along with tax-saving and penalty-free from the government Intelligent Energy Network Service and promotion of energy-efficient products Mobile device recycling: via the trade-in activity at the stores and recycle bins installed to the service centers in line with the promotion for waste recycling in 2025, achieving a reuse percentage of 89.37% with a total of 16.909 metric tons recovered Green Stores: 439 service centers nationwide transformed into “Green Stores” Collaboration with SALcE to promote sustainability partner (products, services, and organizations) certification

Documents

Chunghwa Telecom 2025 GHG Assurance

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ISO 14067 Verification (MOD)

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ISO 14067 Verification (HAMI VIDEO)

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ISO 14067 Verification (CHT CDN)

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ISO 14067 Verification (HiLink)

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ISO 14067 Verification (5G Mobile Internet Service)

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ISO 14067 Verification (HiNet)

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ISO 14067 Verification (Fixed Voice Service)

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ISO 14067 Verification (FTTx Service)

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ISO 14067 Verification (one Chunghwa Telecom's direct sale coounter service-1)

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ISO 14067 Verification (one Chunghwa Telecom's direct sale coounter service-2)

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Certificate for the use of product carbon footprint label(one Chunghwa Telecom's direct sale coounter service)

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Certificate for the use of product carbon footprint label (Hamivideo)

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Certificate for the use of product carbon footprint label (Chunghwa Telecom 5G Mobile Internet Service, Chunghwa Telecom Landline Service, Chunghwa Telecom HiNet Broadband Internet Service - including Fiber Optic Circuit)

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GHG Emissions