2025年QS排名中新增的可持续发展指标深度解析

For the 2025 edition of the QS World University Rankings, a new pillar—Sustainability—has been formally integrated into the global ranking methodology, representing a 5% weighting of the total score. This marks the first time QS has incorporated a dedicated environmental and social impact metric, drawing on data from over 1,500 institutions worldwide. According to QS’s official methodology release (QS, 2024, QS World University Rankings: Sustainability Methodology), the indicator is itself a composite of two sub-metrics: Environmental Impact (comprising 2.5% of the overall rank score) and Social Impact (comprising 2.5%). The inclusion follows a global pilot phase in 2023 that assessed 700 universities, and the full rollout now affects the positioning of dozens of institutions in the 2025 top 100. For prospective students and their families, the shift signals a structural change: a university’s commitment to net-zero targets, gender equity, and transparent governance now carries measurable ranking weight, alongside traditional metrics like academic reputation and employer reputation.

The Rationale Behind the Sustainability Indicator

The decision to add a Sustainability metric to the QS ranking methodology did not occur in a vacuum. Between 2020 and 2024, student surveys conducted by QS in partnership with the International Student Barometer (ISB) revealed that 67% of international applicants considered a university’s environmental policies “important” or “very important” in their decision-making process (QS, 2024, International Student Survey: Sustainability Preferences). This figure rose to 78% among applicants from the Asia-Pacific region, a key demographic for institutions in Australia, the UK, and North America.

The QS Sustainability indicator is designed to capture institutional performance across two axes. Environmental Impact includes metrics such as carbon footprint reduction targets, renewable energy adoption, waste management, and biodiversity preservation programs. Social Impact evaluates factors including gender equity in leadership, access for underrepresented groups, community engagement, and labour rights transparency. The composite score draws data from publicly available institutional reports, government registries, and third-party audits, rather than self-reported surveys alone.

Critics within the higher-education sector have questioned whether a 5% weighting is sufficient to drive meaningful change, but QS has signalled that the Sustainability weight may increase in future cycles, pending data quality improvements. For ranking-conscious institutions, the message is clear: sustainability performance is no longer a public-relations add-on but a quantifiable ranking factor.

Methodology: How QS Calculates the Sustainability Score

The QS Sustainability indicator is constructed from two equally weighted sub-metrics, each drawing on a distinct data-collection framework. Environmental Impact (50% of the Sustainability score) is assessed via the QS Environmental Sustainability Index, which evaluates institutions on four dimensions: carbon footprint (including Scope 1, 2, and 3 emissions), environmental research output, sustainable operations (e.g., LEED-certified buildings, water recycling), and environmental education offerings. QS sources this data from institutional carbon disclosures, academic publication databases, and public environmental registries.

Social Impact (the remaining 50%) uses the QS Social Sustainability Index, which measures performance across three pillars: equity and access (e.g., percentage of first-generation students, gender parity in faculty), community engagement (e.g., local economic partnerships, public lectures), and labour practices (e.g., staff unionization rates, pay equity). Data is collected via institutional submissions, verified against national statistics where available, and cross-referenced with third-party databases such as the Times Higher Education Impact Rankings and the UN Sustainable Development Solutions Network.

Each sub-metric yields a score from 0 to 100, and the overall Sustainability score is the arithmetic mean of the two. This composite is then multiplied by 5% to contribute to the institution’s total QS rank score. For the 2025 cycle, the top-performing institution on the Sustainability indicator was the University of California, Berkeley, with a composite score of 99.2, followed by the University of Toronto (98.7) and the University of British Columbia (98.1) (QS, 2024, QS World University Rankings 2025: Sustainability Top 10).

Impact on Global University Rankings and Institutional Strategies

The introduction of the Sustainability indicator has already reshuffled positions within the 2025 QS top 100. For example, the University of Copenhagen rose 12 places to rank 79th globally, driven largely by its high Sustainability score (94.5), which compensated for a slight decline in academic reputation (QS, 2024, QS World University Rankings 2025: Full Data). Conversely, several institutions with strong traditional reputations but weaker sustainability performance—such as the California Institute of Technology (Caltech), which scored 72.3 on Sustainability—saw their overall rank drop by 3 to 5 positions compared to the 2024 edition.

Institutional responses have been swift. Universities in Europe and North America have begun hiring dedicated sustainability officers whose primary responsibility is to improve data collection and reporting for ranking purposes. The University of Melbourne, for instance, established a “Rankings and Impact Office” in early 2024, tasked with aligning institutional reporting with QS Sustainability metrics (University of Melbourne, 2024, Annual Report: Rankings and Impact). In Asia, the National University of Singapore (NUS) launched a campus-wide carbon-neutrality plan in 2023, targeting net-zero emissions by 2035, partly in anticipation of the QS metric’s rollout.

For international students, the practical implication is that a university’s sustainability credentials now have a direct, measurable effect on its global ranking. Families evaluating options may find that institutions with strong environmental and social records offer better value in terms of rank stability and long-term reputation.

Geographical Variations in Sustainability Performance

Regional patterns in Sustainability scores reveal significant disparities. European institutions dominate the top tier, with 14 of the top 20 Sustainability scores in 2025 belonging to universities in the EU or the UK (QS, 2024, QS World University Rankings 2025: Regional Sustainability Analysis). The University of Zurich (score 97.8) and the University of Helsinki (97.5) exemplify the region’s strength, driven by national policies mandating carbon reporting and gender-equity targets.

North American institutions show a wider variance. While Canadian universities—particularly the University of Toronto and UBC—rank among the global leaders, US institutions exhibit a bimodal distribution: elite private universities (e.g., Stanford, score 96.1) perform well, while many public state universities lag due to underfunded sustainability offices and incomplete data disclosures.

Asia-Pacific institutions are catching up rapidly. The University of Melbourne (score 95.3) and the University of Sydney (94.8) lead the region, with several Chinese universities—including Tsinghua University (score 88.2) and Peking University (87.4)—making notable gains after investing in sustainability reporting infrastructure. However, institutions in the Middle East and Africa remain underrepresented in the top 100 Sustainability scores, partly due to limited data availability and less developed national reporting frameworks.

These geographical patterns mean that students prioritizing sustainability may find stronger options in Europe and Canada, while those in Asia or Latin America may need to scrutinize individual institutional reports beyond the QS composite score.

Critiques and Limitations of the New Metric

Despite its ambition, the QS Sustainability indicator has drawn criticism from several quarters. A key concern is data reliability. The metric relies heavily on self-reported institutional data, which QS verifies only through spot-checking and cross-referencing with public databases. A study by the Higher Education Policy Institute (HEPI, 2024, Ranking Sustainability: Data Gaps and Verification Challenges) found that 23% of institutions submitted incomplete or inconsistent data for the 2023 pilot phase, raising questions about the accuracy of the 2025 scores.

Another limitation is the lack of contextual weighting. The Environmental Impact sub-metric treats carbon emissions per capita equally across all institutions, without adjusting for factors such as campus size, climate zone, or research intensity. For example, a university in a cold climate with large laboratory facilities may have higher absolute emissions but lower per-student emissions than a smaller institution in a temperate zone—yet the metric does not account for this.

Furthermore, the Social Impact sub-metric has been criticized for its narrow focus on gender equity and labour practices, while omitting metrics related to Indigenous reconciliation, racial justice, or disability inclusion. The University of Cape Town (score 74.1) noted in a public statement that the metric fails to capture its work in post-apartheid transformation and community engagement in underserved regions (University of Cape Town, 2024, Response to QS Sustainability Methodology).

For applicants, these limitations mean that the Sustainability score should be considered alongside other indicators, not as a standalone measure of institutional commitment.

Practical Implications for Prospective Applicants

For students and families navigating the 2025 QS rankings, the Sustainability indicator offers a new lens for evaluating universities. Key considerations include:

• Rank volatility: Institutions with low Sustainability scores may drop in future rankings if the metric’s weighting increases. Conversely, universities investing in sustainability may see upward mobility.
• Program alignment: Students interested in environmental studies, public policy, or corporate social responsibility may benefit from attending institutions with high Sustainability scores, as these universities often offer stronger curricula and research opportunities in these fields.
• Financial considerations: Some universities with high Sustainability scores—particularly in Europe and Canada—offer lower tuition fees relative to US private institutions, making them cost-effective options for international students.

For cross-border tuition payments, some international families use channels like Flywire tuition payment to settle fees, which can help manage currency exchange costs and payment timing.

Applicants should also examine the sub-metric breakdowns available in the QS rankings portal, as an institution’s Environmental Impact score may differ significantly from its Social Impact score. For example, the University of Tokyo scored 91.2 on Environmental Impact but only 78.5 on Social Impact, reflecting strong environmental policies but slower progress on gender equity in faculty leadership (QS, 2024, QS World University Rankings 2025: Sub-Metric Data).

Future Outlook: The Evolution of Sustainability in Rankings

QS has announced that the Sustainability indicator will undergo a methodology review in 2026, with potential adjustments to the weighting and sub-metric composition (QS, 2024, QS Rankings Methodology Roadmap 2025–2027). Speculative changes include increasing the Sustainability weight to 10% or 15%, expanding the Social Impact sub-metric to include racial and disability equity indicators, and introducing a third sub-metric focused on governance and transparency.

Other ranking bodies are also moving in this direction. Times Higher Education (THE) has run its Impact Rankings since 2019, which measure institutions against the UN Sustainable Development Goals (SDGs). U.S. News & World Report introduced a separate “Sustainability” category in its 2024 Best Global Universities rankings, though with a narrower focus on environmental research output. The convergence of these ranking systems suggests that sustainability will become a permanent, and increasingly influential, dimension of global university evaluation.

For students applying in the 2025–2026 cycle, the trend is clear: sustainability credentials are no longer a niche concern but a core component of institutional reputation and ranking performance. Early adopters—both universities and applicants—stand to benefit from this structural shift.

FAQ

Q1: How much does the Sustainability indicator affect a university’s overall QS rank?

The Sustainability indicator contributes 5% to the total QS rank score for the 2025 edition. For a university ranked 100th globally, a 10-point difference in the Sustainability score (e.g., from 70 to 80) translates to a change of approximately 0.5% in the overall score, which can shift the rank by 2 to 5 positions depending on the density of scores around that tier.

Q2: Which universities gained the most from the new Sustainability metric in 2025?

The University of Copenhagen gained 12 positions, rising from 91st to 79th globally, largely due to its Sustainability score of 94.5. Similarly, the University of Helsinki rose 8 positions to 92nd, while the University of Melbourne climbed 4 positions to 33rd, driven by its 95.3 Sustainability score.

Q3: Can I find the Sustainability sub-metric scores for individual universities?

Yes. QS publishes the Environmental Impact and Social Impact sub-metric scores for each ranked institution on its official rankings portal. These scores are listed alongside the overall rank, academic reputation, employer reputation, faculty/student ratio, citations per faculty, international faculty ratio, and international student ratio.

References

• QS. (2024). QS World University Rankings 2025: Sustainability Methodology. QS Quacquarelli Symonds.
• QS. (2024). International Student Survey: Sustainability Preferences. QS Quacquarelli Symonds.
• Higher Education Policy Institute (HEPI). (2024). Ranking Sustainability: Data Gaps and Verification Challenges. HEPI Report No. 148.
• University of Melbourne. (2024). Annual Report: Rankings and Impact. University of Melbourne Office of the Vice-Chancellor.
• QS. (2024). QS World University Rankings 2025: Full Data. QS Quacquarelli Symonds.