TransAlta Achieves Full Phase-Out of Coal in Canada

About TransAlta:

TransAlta owns, operates and develops a diverse fleet of electrical power generation assets in Canada, the United States and Australia with a focus on long-term shareholder value. TransAlta provides municipalities, medium and large industries, businesses and utility customers with clean, affordable, energy efficient and reliable power. Today, TransAlta is one of Canada's largest producers of wind power and Alberta's largest producer of hydro-electric power. For over 100 years, TransAlta has been a responsible operator and a proud community-member where its employees work and live. TransAlta aligns its corporate goals with the UN Sustainable Development Goals.

For more information about TransAlta, visit its website at transalta.com.

Cautionary Statement Regarding Forward-looking Information:

This news release contains "forward-looking information" within the meaning of applicable Canadian securities laws, and "forward-looking statements" within the meaning of applicable United States securities laws, including the United States Private Securities Litigation Reform Act of 1995 (collectively referred to herein as "forward-looking statements"). In some cases, forward-looking statements can be identified by terminology such as "continue", "will", "develop", "goal", "target" and similar expressions suggesting future events or future performance. More particularly, and without limitation, this news release contains forward-looking statements and information relating to: the Company's target of reducing 60 per cent, or 19.7 million tonnes, of annual greenhouse gas emission by 2030 over 2015 levels and achieving carbon neutrality by 2050, the Company's expected performance exceeding Canada's national Paris Agreement target, the planned closure of the Highvale coal mine effective December 31, 2021 and the resulting full transition of the Company's thermal facilities in Alberta to 100 per cent natural gas operation, and the expected timing of the retirement of Keephills Unit 1 and the full retirement of Sundance Unit 4. The forward-looking statements contained in this news release are based on current expectations, estimates, projections and assumptions, having regard to the Company's experience and its perception of historical trends, and includes, but is not limited to, expectations, estimates, projections and assumptions relating to the extent of regulations pertaining to COVID-19 not becoming significantly more onerous and current conditions and expected future developments. These statements are subject to a number of risks and uncertainties that may cause actual performance, events or results to differ materially from those contemplated by the forward-looking statements. Some of the factors that could cause such differences include: the effects of weather catastrophes and public health crises, including COVID-19; labour availability; disruptions to the Company's supply chains; failure to obtain necessary regulatory approvals in a timely fashion, or at all; and other risks and uncertainties discussed in the Company's materials filed with the securities regulatory authorities from time to time and as also set forth in the Company's Management's Discussion and Analysis and Annual Information Form for the year ended December 31, 2020, filed under the Company's profile with the Canadian securities regulators on www.sedar.com and the U.S. Securities and Exchange Commission on www.sec.gov. Readers are cautioned not to place undue reliance on these forward-looking statements, which reflect TransAlta's expectations only as of the date of this news release. TransAlta disclaims any intention or obligation to update or revise these forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.