Page 10 - Martin Marietta - 2023 Proxy Statement

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Commitment to Sustainability
Sustainability is part of our culture, including operating in an environmentally responsible manner
2050 Net Zero ambition with strong 2030 commitments
Martin Marietta has an ambition to be Net Zero by 2050 across our entire value chain. We have made a
commitment to reduce the intensity of our Scope 1 CO 2 e process emissions from our heritage cement operations
as compared to 2010 levels by 2030. We have made a commitment to reduce the intensity of our Scope 1 CO 2 e
process emissions from our magnesia specialties business as compared to 2010 levels by 2030. We have made a
commitment to reduce or offset 30% of our Scope 2 CO 2 e emissions by 2030 with a baseline year of 2021 and
1
a goal of Net Zero Scope 2 emissions by 2050. We are expanding our Net Zero goals to include a Net Zero by
2050 ambition for our Scope 1 emissions.
Strategy
As outlined in our Sustainability Report, Martin Marietta has a roadmap for achieving its sustainability goals
including our ambitions and commitments. We seek ways to create lower carbon products. We have a growing
recycled aggregates business in Texas, Minnesota and California. We are invested in our Magnesia Specialties
business which produces magnesia-based products that help our customers reduce their harmful air emissions and
chemical usage, as well as help purify water and neutralize nuclear waste among other applications. Our
Management Development and Compensation Committee reviews management’s performance with regard to
its sustainability goals and considers those achievements in determining incentive pay.
Resilience
We review physical and transition climate risks and the impact on the business of various climate scenarios
and opportunities. We disclose those risks and the materiality of those potential impacts in our Annual Report.
PROXY HIGHLIGHTS and manage climate risks in the same manner as other material risks to the Company.
Our risk management process and sustainability oversight structure allow the Board and management to address

Collaboration
We actively participate in a dialogue to reduce emissions and the related impact on climate change. We
participate in working groups both at the Portland Cement Association (PCA) and National Ready Mixed Concrete
Association to evaluate the feasibility and/or opportunity associated with PCA’s 2050 “Net Zero Roadmap,” along
with other developments relevant to commercial-scale carbon capture and storage (CCS) technologies that we
anticipate being considered by the industry in the coming years. We work with Fortera, a Silicon Valley-based
materials technology company, that is permitting and constructing a pilot carbon capture plant and determining
the feasibility of this technology at other locations.

1 Facilities in most source categories subject to the United States Environmental Protection Agency’s (USEPA’s) Greenhouse Gas Reporting Program
(codified at 40 CFR Part 98), including cement production, began reporting emissions in 2010. Thus, we believe 2010 is a year with reliable and
comparable data across a side range of facilities in the U.S. Our Scope 1 CO 2 e emissions intensity associated with our cement operations in 2010
was 0.836. Notably, when we announced our 2030 emissions reduction targets in 2019, as described above, we took into account that we have
been investing heavily over the past decade to reduce our cement and magnesia emissions, which is reflected in our favorable CO 2 e intensity
performance relative to the U.S. cement industry average. We also believe this has allowed us to achieve significant environmental benefits from
reduced emissions well ahead of many other operators in the industry and will position us not only to achieve our targets but to be in a good
position to evaluate additional actions in the future.

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