Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 270

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 270
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 L     |     | L    |     | L     |     | H            |
| Area of land use          |     | M     |     | H    |     | L     |     | M            |
| Area of freshwater use    |     | H     |     | NA   |     | NA    |     | M            |
| Biological alterations(2) |     | H     |     | NA   |     | NA    |     | NA           |

Legend: (L) Low, (M) Medium, (H) High, (VH) Very High and (NA) Not Applicable, as defined by the TNFD Additional Sector Guidance - Electric Utilities and Power Generators (June 2024).

| (1) | Noise and light disturbances are material to our operations but were excluded from this analysis                                                                                                                                                         
 because mitigations are built into project design and monitored during operations, in accordance with applicable regulatory requirements in the jurisdictions in which we operate. The state of nature (e.g., species extinction risk, direct mortality, 
 fisheries risk and incidents related to birds, bats, fish and others) is material to our operations but was not included in this table because the TNFD has not provided the associated materiality ratings. Metrics related to the state of nature were 
 included in our analysis and are summarized under the Biodiversity heading in the Environmental Performance section of this MD&A.                                                                                                                        |

| (2) | Biological alterations or interferences include the impact from activities that directly 
 introduce nonnative invasive species into areas of operation.                            |

Potential Risks, Opportunities and Mitigation Measures Nature-related risks are the potential threats posed to an organization linked to its dependencies on nature and its impacts on nature. These can derive from physical and transition risks. The analysis of TransAlta’s nature-related risks and opportunities was conducted with a focus on physical risks. These risks were evaluated to help us understand how our operations result in changes in the state of nature and how this affects ecosystem service provision. Transition risks such as regulatory and policy, reputation, market and technology risks related to the Company are discussed in the Governance and Risk Management section of this MD&A. Transition risks related to climate change are disclosed in the Managing Climate Change Risks and Opportunities section of this MD&A. Nature-related opportunities are activities that create positive outcomes for organizations and nature by avoiding or reducing impact on nature, or contributing to its restoration. The metrics we use to assess and manage material nature-related dependencies and impacts as well as risks and opportunities