Introduction

Higher education institutions (HEIs) are increasingly expected to reduce their carbon footprint in response to climate change, rising energy costs, and the United Nations Sustainable Development Goals. Universities function as small urban ecosystems with substantial energy demand for electricity, heating, laboratories, and digital infrastructure. While many studies have examined campus decarbonization in developed and high-income countries, quantitative evidence from transition economies and Central Asia remains limited, particularly for campuses dependent on fossil-fuel-based district heating and centralized electricity systems. Addressing this literature gap, this study develops and evaluates a campus-scale decarbonization pathway for the Tashkent Institute of Chemical Technology (TICT), located in Uzbekistan.

Methodology

A greenhouse gas (GHG) inventory was developed using an activity-based approach aligned with the GHG Protocol. The baseline inventory represents campus operations prior to the implementation of sustainability measures and integrates energy audits, utility records, and national emission factors to quantify Scope 1 (direct fuel use), Scope 2 (purchased electricity), and selected Scope 3 emissions. The analysis includes electricity consumption in academic and administrative buildings of the TICT, natural gas use for heating, and indirect emissions associated with paper consumption and digital services.

Results

On a technical level, the institute deployed over 4,900 square meters of solar photovoltaic panels to mitigate reliance on carbon-intensive grid electricity. Simultaneously, inefficient district heating connections were replaced with autonomous, high-efficiency boiler systems, which reduced natural gas consumption by approximately 30%. These infrastructural upgrades were paired with institutional digitalization and behavioral awareness campaigns to minimize resource waste, alongside nature-based solutions such as large-scale landscaping to enhance localized carbon sequestration. Following the integration of these combined technological, institutional, and ecological measures, total campus-wide CO₂-equivalent emissions decreased by nearly 61% compared to the baseline.

Conclusion

This study demonstrates that integrating renewable energy, efficient heating systems, digitalization, and nature-based solutions can significantly reduce campus greenhouse gas emissions. In this line, this work provides one of the first comprehensive GHG-Protocol-based campus decarbonization assessments in Central Asia and offers a replicable roadmap for universities in transition economies pursuing sustainable campus transformation.