Company: TSLTF
Filing Date: 2025-12-12
Form Type: SUPPL
Source: 0001193125-25-317786
Chunk: 271

Company: TRANSALTA CORP
Filing Date: 2025-12-12
Form: SUPPL
Chunk 271
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 solar facility (122 MW), which is composed 
 of 20 small sites throughout the state.   Further information on mortality of species at risk can be found under the Biodiversity heading in the Environmental Performance section of this MD&A.                                                                                            |

| TransAlta Corporation |     | 2024 Integrated Report |     | M117 |

Management’s Discussion and Analysis Identified Potential Risks and Opportunities and Mitigation Measures (Continued)

| M118 |     | TransAlta Corporation |     | 2024 Integrated Report |

Management’s Discussion and Analysis Environmental Performance Our performance on managing environmental aspects is presented in the following sections and excludes the acquisition of Heartland Generation on Dec. 4, 2024. Energy Use TransAlta uses energy in a number of different ways. We burn natural gas, diesel and coal to generate electricity. We plan to cease coal-fired generation at Centralia by the end of 2025. We harness the kinetic energy of water and wind to generate electricity. We also generate electricity from the sun. In addition to combustion of fuel sources, we also track combustion of gasoline and diesel in our vehicles and the electricity use and fuel use for heating (such as natural gas) in the buildings we occupy. Knowledge of how much energy we use allows us to optimize and create energy efficiencies. As an electricity generator, we continually and consistently look for ways to optimize and create efficiencies related to the use of energy. The following table captures our energy use (petajoules). Energy use decreased by 11 per cent in 2024 over 2023. Some values do not sum to the indicated total due to rounding. Zeros (0) indicate truncated values.

| Year ended Dec. 31             |     | 2024 |     |     | 2023 |     |     | 2022 |     |
|:-------------------------------|:----|:-----|----:|:----|:-----|----:|:----|:-----|----:|
| Hydro                          |     |      |   0 |     |      |   0 |     |      |   0 |
| Wind and Solar                 |     |      |   0 |     |      |   0 |     |      |   0 |
| Gas                            |     |      | 122 |     |      | 123 |     |      | 130 |
| Energy Transition              |     |      |  52 |     |      |  73 |     |