Investor Presentation November 2023

Case Study: Montrose Impact on the Environment Through Business Solutions • • • • The Montrose Carbon Conversion Process (CCP) uses a non-toxic, water-based solvent to remove and permanently sequester 99.99% of CO2 from process and combustion exhaust streams. The process produces a carbonate species with resale value, and with the reuse of waste heat and its low parasitic load, provides a negative carbon intensity score (1) Similar approaches have been attempted in the past, but have encountered issues, including kinetic and mass transfer limitations, harmful product degradation, lack of odor-control, and risk of groundwater contamination from accidental environmental release. Our process has overcome these barriers with a patented 2-step gas transfer technology with low energy consumption. The process removes CO2 concentrations ranging from 0.04% - 100% from influent sources and is easily scalable for a relatively small footprint. It is also reliable, easy to operate, and sequesters the CO₂ into a stable, valuable product for sale or consumption. Carbon capture technology that reduces up to 14% of global GHG emissions by 2050 (2), and our CCP contributes to the availability of this technology. Carbon capture is viewed as the only practical way to achieve deep decarbonization in the industrial sector. With less complexity, our solution is easier and faster to deploy around the globe. Our CCP contributes to the availability of carbon capture technology that may reduce up to 14% of global GHG emissions by 2050(2). Notional layout of Montrose Carbon Conversion technology deployed in a pilot configuration. The expected footprint of a pilot is approximately 10' x 10' and involves 2 IBC totes, a 1000-gallon polyethylene cooling tank (to be substituted out in a in a full-scale unit), a 500 gallon carbon conversion reactor and associated programmable logic. 1) Carbon intensity score is the metric tons of CO2 equivalent per unit of physical or economic output. IFRS Sustainability (March 2022). Exposure Draft IFRS S2 Climate-related Disclosures. IFRS. https://www.ifrs.org/content/dam/ifrs/project/climate-related- disclosures/issb-exposure-draft-2022-2-climate-related-disclosures.pdf 2) https://www.c2es.org/content/carbon-capture/ © 2023 Montrose Environmental Group, Inc. Proprietary. | 17

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