In 2025, NOS completed a corporate carbon footprint assessment and publicly disclosed its greenhouse gas (GHG) emissions according to the GHG Protocol, covering Scope 1 (direct emissions from owned or controlled sources), Scope 2 (indirect emissions from purchased energy) and Scope 3 (indirect emissions across the value chain).
NOS has also provided a category-level breakdown for 11 out of 15 Scope 3 emissions categories, offering greater transparency into its value chain emissions.
| Metric (tCO2e) | 2025 | 2024 | 2023 | 2022 - 2017 |
|---|---|---|---|---|
Total Scope 1 | 5,250a | 3,988a | 4,545b | |
Total Scope 2 | ||||
Market-Based | 4,331a | 35,766a | 47,686b | |
Location-Based | 14,070a | 22,266a | 32,996b | |
Total Scope 3 | 172,106a | 169,411a | 191,033b | |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 2.4494a | 2.2593a | 2.5706b |
You are welcome to quote or reference individual data points from this page, provided you include the following attribution with a visible, clickable link to this page: "Source: Tracenable, the global reference for ESG data"
Bulk collection, scraping, resale, or redistribution of data across multiple company profiles is not permitted without our prior written permission. For more information, see our General Terms and Conditions.
Every figure on this dashboard has a transparent audit trail. With Tracenable, each data point is traceable back to its original source, viewable directly inside our platform. Explore NOS’s data sources below and access millions more through our Disclosure Search.
In 2025, the total operational greenhouse gas (GHG) emissions of NOS amounted to 19,320 metric tons of CO2 equivalent. This figure includes both direct emissions from owned or controlled sources (Scope 1) and indirect emissions from purchased energy (Scope 2).a
Compared to 2024, the total operational greenhouse gas (GHG) emissions of NOS decreased by 26.41%, showing that the company has made progress in taking action to reduce the climate impact of its operations.a
In 2025, the total Scope 1 emissions of NOS were 5,250 metric tons of CO₂ equivalent (tCO₂e).a
Since 2019, NOS's Scope 1 emissions have decreased by 28.28%, reflecting a declining long-term trend in Scope 1 emissions over time.a
Compared to the previous year (2024), NOS's Scope 1 emissions increased by 31.64%, suggesting that the company faced challenges in reducing emissions from its directly owned or controlled operations.a
In 2025, NOS reported Scope 2 greenhouse gas (GHG) emissions of 4,331 tCO₂e using the market-based method and 14,070 tCO₂e using the location-based method.a
Since 2019, NOS's Scope 2 greenhouse gas (GHG) emissions (Location-Based) have decreased by 70.76%, reflecting a declining long-term trend in Scope 2 emissions over time.a
Compared to the previous year (2024), NOS's Scope 2 emissions (Location-Based) fell by 36.81% in 2025, showing that the company has made progress in taking action to reduce the climate impact of its energy consumption.a
In 2025, NOS reported its Scope 2 emissions using the market-based method and using the location-based method.a
In 2025, NOS reported 172,106 metric tons of CO₂ equivalent (tCO₂e) of Scope 3 greenhouse gas (GHG) emissions, representing indirect emissions across its upstream and downstream value chain.a
The 2025 disclosure of NOS includes a breakdown across 11 of the 15 Scope 3 categories defined by the GHG Protocol, matching the level of disclosure in 2024, demonstrating consistent Scope 3 emissions reporting coverage year over year.a
In 2025, NOS reported total Scope 3 emissions of 172,106 metric tons of CO₂ equivalent (tCO₂e).a
Approximately 84.51% of these emissions originated from upstream activities such as purchased goods and capital goods, while 15.49% came from downstream activities like product use, distribution, and end-of-life treatment.a
Since 2019, NOS's Scope 3 emissions have decreased by 44.64%, reflecting a declining long-term trend in Scope 3 emissions over time.a
Compared to the previous year (2024), NOS's Scope 3 emissions remained relatively stable, indicating that NOS's emissions have plateaued with no significant change in its value chain footprint.a
In 2025, NOS reported emissions for 11 out of the 15 Scope 3 categories defined by the GHG Protocol.a
This reflects a high level of granularity and transparency in the company's emissions reporting.
In 2025, the largest contributors to NOS's Scope 3 emissions were:a
In 2025, NOS reported Scope 1 greenhouse gas (GHG) emissions of 5,250 tCO₂e and total revenues of USD 2,143 millions. This translates into an emissions intensity of 2.45 tCO₂e per millions USD.a
In 2025, NOS reported a Scope 1 emissions intensity of 2.45 tCO₂e per millions USD. Compared to the peer group median of 2.14, this places the company above its industry benchmark, indicating it is less carbon-efficient than most competitors.a
In 2025, NOS ranked 14 out of 23 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
NOS is therefore positioned in the mid-range of its industry, neither a clear leader nor a laggard in carbon efficiency.a
In 2025, NOS reported a total carbon footprint of 191,426 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 2.17% decrease compared to 2024, indicating progress in reducing its overall greenhouse gas output.a
The largest contributor to NOS's total carbon footprint was Scope 3 emissions, accounting for 89.91% of the company's total carbon footprint, followed by Scope 2 emissions at 7.35%.a