In 2025, NSI 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).
However, NSI has not published a category-level breakdown of its Scope 3 emissions, limiting visibility into specific value chain sources.
| Metric (tCO2e) | 2025 | 2024 | 2023 | 2022-2019 |
|---|---|---|---|---|
Total Scope 1 | 2,038.081a | 2,462.505a | 897.855b | |
Total Scope 2 | ||||
Market-Based | 1,389.058a | 840.81a | 853.215b | |
Location-Based | 5,046.941a | 6,230.596a | 8,090.807b | |
Total Scope 3 | 1,298.915a | 567.108a | 6,006.116b | |
Total Scope 1 Revenue Intensity (tCO2e/$M) | 23.4668a | 32.5362a | 11.3935b |
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In 2025, the total operational greenhouse gas (GHG) emissions of NSI amounted to 7,085.022 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 NSI decreased by 18.5%, 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 NSI were 2,038.081 metric tons of CO₂ equivalent (tCO₂e).a
Since 2023, NSI's Scope 1 emissions have increased by 126.99%, reflecting a rising long-term trend in Scope 1 emissions over time.ab
Compared to the previous year (2024), NSI's Scope 1 emissions decreased by 17.24%, highlighting the company's efforts to lower direct emissions from assets it owns or controls.a
In 2025, NSI reported Scope 2 greenhouse gas (GHG) emissions of 1,389.058 tCO₂e using the market-based method and 5,046.941 tCO₂e using the location-based method.a
Since 2023, NSI's Scope 2 greenhouse gas (GHG) emissions (Location-Based) have decreased by 37.62%, reflecting a declining long-term trend in Scope 2 emissions over time.ab
Compared to the previous year (2024), NSI's Scope 2 emissions (Location-Based) fell by 19% in 2025, showing that the company has made progress in taking action to reduce the climate impact of its energy consumption.a
In 2025, NSI reported its Scope 2 emissions using the market-based method and using the location-based method.a
In 2025, NSI reported 1,298.915 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 NSI includes a breakdown across 0 of the 15 Scope 3 categories defined by the GHG Protocol, down from 1 in 2024, indicating a decline in reporting granularity and reduced insight into the company's full value chain emissions.a
In 2025, NSI reported total Scope 3 emissions of 1,298.915 metric tons of CO₂ equivalent (tCO₂e).a
Since 2023, NSI's Scope 3 emissions have decreased by 78.37%, reflecting a declining long-term trend in Scope 3 emissions over time.ab
Compared to the previous year (2024), NSI's Scope 3 emissions increased by 129.04%, suggesting that the company faced challenges in reducing emissions across its value chain.a
In 2025, NSI reported Scope 1 greenhouse gas (GHG) emissions of 2,038.081 tCO₂e and total revenues of USD 87 millions. This translates into an emissions intensity of 23.47 tCO₂e per millions USD.a
In 2025, NSI reported a Scope 1 emissions intensity of 23.47 tCO₂e per millions USD. Compared to the peer group median of 4.47, this places the company above its industry benchmark, indicating it is less carbon-efficient than most competitors.a
In 2025, NSI ranked 24 out of 25 companies in its industry peer group, based on Scope 1 emissions intensity (measured in tCO₂e per millions USD).a
This places NSI among the least efficient performers, with one of the highest emissions intensities in its sector.a
In 2025, NSI reported a total carbon footprint of 8,383.937 metric tons of CO₂ equivalent (tCO₂e) across Scope 1, Scope 2, and Scope 3 emissions. This represents a 9.46% decrease compared to 2024, indicating progress in reducing its overall greenhouse gas output.a
The largest contributor to NSI's total carbon footprint was Scope 2 emissions, accounting for 60.2% of the company's total carbon footprint, followed by Scope 1 emissions at 24.31%.a