Greenhouse Gas Emissions
Building on systematic greenhouse gas inventories, Chang Gung University continues to advance campus decarbonization and carbon neutrality through transparent emissions management, energy efficiency improvement, renewable energy development, and low-carbon campus governance.
Greenhouse Gas Management
Chang Gung University recognizes climate change and greenhouse gas management as important sustainability issues. In accordance with relevant regulations and international standards, CGU has established a systematic greenhouse gas inventory and emissions management mechanism to continuously monitor campus carbon emissions and advance low-carbon campus governance.
The University conducts greenhouse gas inventories based on the GHG Protocol and ISO 14064-1. Through annual inventories, emissions analysis, and external verification, CGU continues to enhance the completeness, transparency, and management effectiveness of its emissions data, providing an important foundation for campus decarbonization and net-zero strategies.
CGU also integrates greenhouse gas management with energy management, equipment upgrades, renewable energy development, and energy-saving measures to progressively reduce operational emissions and strengthen campus sustainability governance and climate resilience.
Key Achievements
Carbon Reduction Targets
Carbon Emissions
Reduce carbon emissions by 10% compared with the 2023 baseline.
Carbon Emissions
Reduce carbon emissions by 25% compared with the 2023 baseline.
Campus Transition
Achieve carbon neutrality through long-term campus decarbonization and energy transition.
Our Management Approach
Annual Inventory
Since 2020, CGU has independently conducted greenhouse gas inventories every year based on the GHG Protocol methodology.
External Verification
Since 2024, third-party verification has been conducted in accordance with ISO 14064-1:2018 and CNS 14064-1:2021 to strengthen transparency and credibility.
Rolling Management
CGU plans to adopt a rolling management approach in which an internal inventory is conducted in one year and external verification in the following year, continuously improving its carbon management system.
Climate Governance & Low-Carbon Transition
CGU continues to integrate greenhouse gas management into its sustainability governance and institutional development framework. Through cross-unit collaboration, the University advances campus decarbonization, energy transition, and low-carbon governance.
Looking ahead, CGU will continue to align with Taiwan's national net-zero policy and sustainable development trends in higher education, progressively strengthening carbon management systems and campus decarbonization actions toward a low-carbon and sustainable campus.
Greenhouse Gas Management Progress
Since 2020, CGU has independently conducted annual greenhouse gas inventories based on the Greenhouse Gas Protocol (GHG Protocol). Beginning in 2024, external third-party verification was introduced, and the inventory methodology was transitioned to ISO 14064-1:2018 / CNS 14064-1:2021 . Accordingly, 2023 was selected as the inventory baseline year.
Total greenhouse gas emissions in 2025 were 21,332.700 tCO₂e/year , representing a decrease of 364.89 tCO₂e compared with 2024.
One of the main contributing factors was that total electricity consumption in 2025 decreased by 396,894 kWh compared with 2024. CGU will continue to optimize energy management and increase energy self-sufficiency to progressively advance toward campus carbon neutrality.
Emissions Structure
The following table presents the University's greenhouse gas emissions structure from 2023 to 2025.
| Emission Source | 2023 | 2024 | 2025 | Change Rate |
|---|---|---|---|---|
| Stationary Emissions | 12.943 | 15.950 | 51.767 | ▲ 300% |
| Mobile Emissions | 4.258 | 5.286 | 4.692 | ▲ 10.2% |
| Fugitive Emissions | 3,266.040 | 3,218.881 | 3,013.162 | ▼ −7.7% |
| Energy Indirect Emissions | 19,483.143 | 18,237.036 | 18,048.909 | ▼ −7.4% |
| Other Indirect Emissions | 217.797 | 220.437 | 214.170 | ▼ −1.7% |
| Total GHG Emissions | 22,984.181 | 21,697.590 | 21,332.700 | ▼ −7.19% |
Data Notes
- Restaurants and commercial vendors operate on campus with separate electricity meters. As the University uses a single Taipower electricity meter for billing, CGU maintains a separate monthly utility record for restaurant and vendor electricity, water, and gas consumption. Their electricity use is deducted from total campus electricity consumption when calculating the University's actual purchased electricity use.
- CGU has installed solar photovoltaic systems. Phase I was completed and connected to the grid on April 26, 2023, generating 602,304 kWh in 2025 under a feed-in tariff arrangement with Taipower. Phase II was completed in March 2025 and generated 347,585 kWh in 2025 under a self-generation and self-consumption model.
- Category 2 energy indirect emissions for 2023 contained a calculation discrepancy caused by duplicate deduction of electricity used by on-campus vendors. The data were corrected in the 2024 Sustainability Report.
- As third-party greenhouse gas verification was introduced in 2024 and the inventory methodology was adjusted, 2023 was designated as the baseline year. Therefore, 2022 emissions data are no longer disclosed.
Greenhouse Gas Composition
CO₂ remains the University's primary greenhouse gas emission source, accounting for more than 85% of total emissions, followed by CH₄ and HFCs.
| Gas | 2023 | 2024 | 2025 |
|---|---|---|---|
| CO₂ | 85.79% | 85.16% | 85.95% |
| CH₄ | 7.96% | 8.21% | 8.01% |
| HFCs | 5.68% | 6.01% | 5.92% |
| Other Gases | <1% | <1% | <1% |
International Standards & SDGs
Advancing Campus Decarbonization Through Transparent Greenhouse Gas Management
CHANG GUNG UNIVERSITY · GREENHOUSE GAS MANAGEMENT