In 2025, NOS disclosed key data related to its energy management practices, providing transparency into its operational energy use in line with recognized sustainability reporting frameworks.
NOS disclosed progress toward renewable energy adoption, highlighting the share of total energy sourced from renewable versus non-renewable sources.
| Metric (GJ) | 2025 | 2024 | 2023 | 2022-2019 |
|---|---|---|---|---|
Total Energy Consumption | 736,510a | 712,202a | 736,571a | |
Non-Renewable Energy Consumption | 107,809a | 388,184a | 542,743a | |
Renewable Energy Consumption | 628,700a | 324,018a | 193,828a | |
Renewable Energy Production | 842a | 191a | 140a |
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In 2025, NOS consumed a total of 736,509.6 Gigajoules of energy across its operations. Of this total, 85.36% 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 14.64% 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, NOS consumed a total of 736,509.6 Gigajoules of energy, of which 85.36% was derived from renewable sources, including biofuels, biomass, biogas, solar, and wind power.a
This high level of renewable energy use suggests that NOS has taken strong steps toward decarbonizing its energy supply and reducing its dependence on fossil fuels.
Since 2019, NOS's total energy consumption increased by 16.71%, including a 3.41% increase in 2025, reflecting a sustained rise in overall energy demand.a
Over the same period, the share of renewable energy in NOS's consumption increased by 78.6%, including a 87.63% increase in 2025, showing consistent progress in clean energy adoption.a
Overall, NOS has seen rising energy demand, but has also made strong and consistent progress in increasing its reliance on renewable energy—mitigating the environmental impact of its growing consumption.