In 2025, ISS disclosed key data related to its energy management practices, providing transparency into its operational energy use in line with recognized sustainability reporting frameworks.
ISS disclosed progress toward renewable energy adoption, highlighting the share of total energy sourced from renewable versus non-renewable sources.
| Metric (GJ) | 2025 | 2024 |
|---|---|---|
Total Energy Consumption | 965,776a | 969,516a |
Non-Renewable Energy Consumption | 946,271a | 954,853a |
Renewable Energy Consumption | 19,505a | 14,663a |
Renewable Energy Production | 234a | 227a |
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In 2025, ISS consumed a total of 965,775.6 Gigajoules of energy across its operations. Of this total, 2.02% was sourced from renewable energy, either derived from natural resources like biofuels, biomass, or biogas, or generated using renewable technologies such as solar or wind power. The remaining 97.98% was classified as non-renewable energy, coming from fossil-based fuels such as coal, natural gas, or crude oil, or from non-renewable generation technologies like nuclear power.a
In 2025, ISS consumed a total of 965,775.6 Gigajoules of energy, of which 2.02% was derived from renewable sources, including biofuels, biomass, biogas, solar, and wind power.a
This low level of renewable energy use highlights a heavy reliance on fossil fuels or other non-renewable sources, suggesting that ISS has considerable room to improve its energy sustainability strategy.
Since 2025, ISS's total energy consumption has remained relatively stable, indicating no significant changes in energy use patterns.a
Over the same period, the share of renewable energy in ISS's consumption increased by 33.54%, showing a recent positive trend in clean energy adoption.a