Our subsidiary Plants & Goodwin, Inc. (“P&G”) helped advance a large-scale infrastructure project converting a coal-fired power plant into a cleaner, natural gas-fired power plant in Western Pennsylvania. This was achieved through a USD $1.5 million project to permanently decommission nine “marginal” conventional gas wells.

Additionally, P&G is working with a private infrastructure developer to finalize approvals in order to proceed with another infrastructure project (valued at more than USD $5 million) in the state of Louisiana, marking Zefiro’s official expansion into its eighth U.S. state.

Fort Lauderdale, Florida–(Newsfile Corp. – December 18, 2025) – ZEFIRO METHANE CORP. (Cboe Canada: ZEFI) (FSE: Y6B) (OTCQB: ZEFIF) (the “Company”, “Zefiro”, or “ZEFI”) is pleased to announce that its subsidiary Plants & Goodwin, Inc. (“P&G”) has successfully completed a plug and abandonment project valued at USD $1.5 million as part of the conversion of a coal power plant into a natural gas-powered plant on a site located approximately 50 miles east of Pittsburgh, in Indiana County, PA.

During the redevelopment project, nine conventional gas wells were located on the site – all of which had fallen into “marginal” production status. P&G was brought in to permanently decommission these wells. This three-month undertaking was an essential step towards allowing the coal power plant conversion initiative to continue after being stalled due to the presence of these unplugged wells.

Throughout 2025, P&G has successfully executed on several opportunities to conduct infrastructure-improvement work, which differs from P&G’s typical plug and abandonment jobs done for government and corporate clients. This type of work typically entails plugging wells for the specific purpose of unlocking business value (e.g., enabling new commercial builds to take place, mitigating ongoing costs from non-hazardous wells, etc.). Earlier this year, P&G completed these types of projects for clients that include a major defence/aerospace contractor, as well as a global e-commerce conglomerate.

Shown above is a photo from one of P&G’s plug-and-abandonment projects in Texas (2024) demonstrating the extent of work that is often required to decommission an orphaned or abandoned well

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Readers using news aggregation services may be unable to view the media above. Please access SEDAR+ or the Investors section of the Company’s website for a version of this press release containing all published media.

P&G Chief Executive Officer Luke Plants (who also serves as Zefiro’s Senior Vice President of Corporate Development) commented, “As a Western PA native, I applaud the multi-billion dollar investments that are being made in the region to establish modern, reliable, and efficient infrastructure for power generated using the region’s abundant natural gas reserves. Unfortunately, the countless population of unplugged oil and gas wells can prove to be an obstacle for these developments. However, P&G is uniquely equipped to act promptly when needed, helping clear the way for progress to safely be made.”

Mr. Plants continued, “While our projects are typically meant to abate emissions or protect groundwater, opportunities like these exemplify a third important reason for addressing legacy oil and gas wells – the ability for the United States to achieve AI and energy dominance. Our oil and gas fields must be cleaned up to facilitate our economic transformation. We are pleased to have had the opportunity to enable this power plant redevelopment project to move forward, and we hope to continue playing a role in unlocking possibilities for new developments in American energy.”

Zefiro is also pleased to announce that P&G is expected to soon begin its first-ever project in the state of Louisiana, with a plug-and-abandonment program to support new infrastructure development. This project is expected to generate more than USD $5 million in revenue and run until March 2026, subject to customary approvals and scheduling. Once officially finalized, additional details regarding this project will be announced in a separate press release.

About Zefiro Methane Corp.

Zefiro is an Environmental Services Company, specializing in methane abatement. Zefiro strives to be a key commercial force towards Active Sustainability. Leveraging decades of operational expertise, Zefiro is building a new toolkit to clean up air, land, and water sources directly impacted by methane leaks. The Company has built a fully integrated ground operation driven by an innovative monetization solution for the emerging methane abatement marketplace. As an originator of high-quality U.S.-based methane offsets, Zefiro aims to generate long-term economic, environmental, and social returns.

On behalf of the Board of Directors of the Company,

ZEFIRO METHANE CORP.

Catherine Flax

Chief Executive Officer

For further information, please contact:

Zefiro Investor Relations
1 (800) 274-ZEFI (274-9334)
investor@zefiromethane.com

Forward-Looking Statements

This news release may contain forward-looking statements within the meaning of applicable securities laws, including, U.S. and Canadian securities regulations and laws. These forward-looking statements are based on current expectations, estimates, projections, beliefs, and assumptions of management, including those of Zefiro Methane Corp., as of the date of this news release. Forward-looking statements typically include words such as “anticipates,” “outlook”, “seeks”, “expects,” “intends,” “plans,” “believes,” “estimates,” “may,” “will,” “should,” “could,” “would,” “continue,” “forecast,” “potential,” “targets,” “goals,” “vision,” “strategy,” and similar expressions or variations thereof. These statements may relate to, among other things, the Company’s operational outlook, expansion plans, future direction, strategic initiatives, business plans, regulatory environment, growth prospects, pipeline, financial performance, timing and scope of projects, future market conditions, funding and capital requirements, partnerships, or other business developments. The forward-looking information reflects management’s current expectations based on information currently available and are subject to a number of risks and uncertainties that may cause outcomes to differ materially from those discussed in the forward-looking information. Although the Company believes that the assumptions and factors used in preparing the forward-looking information are reasonable, undue reliance should not be placed on such information and no assurance can be given that such events will occur in the disclosed timeframes or at all.

In addition, any statements made in this news release are not guarantees of future performance and are subject to a number of known and unknown risks, uncertainties, and other factors, many of which are outside the Company’s control, that could cause actual results or outcomes to differ materially from those expressed or implied by such forward-looking statements. These factors include, but are not limited to: fluctuations in commodity prices, changes in regulatory or political environments, operational risks, financing risks, market demand for emissions reduction or environmental services, delays in project execution, reliance on third-party partners or vendors, competition, and the overall economic environment. For a more detailed discussion of these factors and other risks, see the section entitled “Financial Risks” in Zefiro’s management’s discussion and analysis for the year ended June 30, 2025 and “Risk Factors” in Zefiro’s annual information form for the year ended June 30, 2025, each of which is available under Zefiro’s profile on SEDAR+ at www.sedarplus.com.

Factors that could cause actual results or events to differ materially from current expectations include, but are not limited to: (i) adverse general market and economic conditions; (ii) changes to and price and volume volatility in the carbon market; (iii) changes to the regulatory landscape and global policies applicable to the Company’s business; (iv) failure to obtain all necessary regulatory approvals; and (v) other risk factors set forth in its most recent Prospectus under the heading “Risk Factors”. The Company operates in a rapidly evolving environment where technologies are in the early stage of adoption. New risk factors emerge from time to time, and it is impossible for the Company’s management to predict all risk factors, nor can the Company assess the impact of all factors on Company’s business or the extent to which any factor, or combination of factors, may cause actual results to differ from those contained in any forward-looking information. Forward-looking information in this news release is based on the opinions and assumptions of management considered reasonable as of the date hereof, including, but not limited to, the assumption that general business and economic conditions will not change in a materially adverse manner. Although the Company believes that the assumptions and factors used in preparing the forward-looking information in this news release are reasonable, undue reliance should not be placed on such information. The forward-looking information included in this news release is made as of the date of this news release and the Company expressly disclaims any intention or obligation to update or revise any forward-looking information whether as a result of new information, future events or otherwise, except as required by applicable law.

Zefiro Methane Corp. does not undertake any obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, or otherwise, except as required by applicable law. Readers are cautioned not to place undue reliance on these forward-looking statements.

Also, this news release may include market and industry data obtained from various publicly available sources and other sources believed by the Company to be true. Although the Company believes it to be reliable, the Company has not independently verified any of the data from third-party sources referred to in this presentation or analyzed or verified the underlying reports relied upon or referred to by such sources, or ascertained the underlying assumptions relied upon by such sources. The Company does not make any representation as to the accuracy of such information.

This news release is for informational purposes only and does not constitute an offer to sell or a solicitation of an offer to buy any securities of Zefiro Methane Corp., nor shall it form the basis of or be relied upon in connection with any investment decision.

Statement Regarding Third-Party Investor Relations Firms

Disclosures relating to investor relations firms retained by Zefiro Methane Corp. can be found under the Company’s profile on SEDAR+ at www.sedarplus.ca/.

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