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TransAlta Corporation greenhouse gas emissions 2015-2020

TransAlta Corporation's annual greenhouse gas emissions from 2015 to 2020

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Source

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Release date

June 2021

Region

Worldwide, Canada

Survey time period

2015 to 2020

Supplementary notes

Figures prior to 2018 were taken from a previous report
The source adds the following information: "GHG emissions are calculated and reported from TransAlta-operated facilities in line with carbon compliance regulations from the geographic jurisdiction where the facility is located. For GHG emissions that are not calculated using jurisdictional carbon compliance guidance we follow guidance from the Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard (specifically ‘Setting Organizational Boundaries: Operational Control’ methodology). As per the operational control methodology, TransAlta reports 100 per cent of GHG emissions from facilities at which we are the operator. GHG emissions include emissions from stationary combustion, transportation use, building use and fugitive emissions. We report both scope 1 and scope 2 emissions. An estimate of our scope 3 emissions can be found in our 2020 MD&A and our 2020 CDP climate change report. Global warming potentials can vary with respect to regional compliance guidance. We compile our corporate GHG inventory using our business segment GHG calculations. The Clean Energy Regulator in Australia amended global warming potentials in August of 2020 and the use of global warming potentials in our Australia Gas GHG calculations differ from the rest of our fleet as a result of these amendments. Applying harmonized global warming potentials across our fleet would result in a minor variance to our overall calculated GHG totals.

Gross GHG emissions or gross carbon dioxide equivalent (CO2e) emissions is the sum of carbon dioxide, methane, nitrous oxide and sulphur hexafluoride (SF6). Consequently, the sum of scope 1 and 2 emissions will equate to gross CO2e emissions or gross GHG emissions. Minor adjustments were made to historical 2018 and 2019 GHG emissions data primarily from our wind & solar, hydro and natural gas business segments as a result of adjusted historical energy use volumes. A minor adjustment was made to 2019 SF6 emissions as a result of an internal discrepancy at our Sarnia facility. An SF6 leak from late in 2019 was not reported in our system until 2020."

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