Page 63 - Martin Marietta - 2024 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Our Investments in Reducing our Carbon Intensity

While awaiting further development of carbon capture than “cementitious material” typically used by EU cement
technology, we have worked hard and invested heavily in companies in their reporting. Although our cement
our sustainability practices and improved carbon intensity includes some blending with non-clinker materials, like
in our heritage cement manufacturing operations, other U.S. operators, we are not permitted to substitute
including employing and improving on patented clinker at the higher percentages permitted in the EU.
production processes, upgrading equipment, improving Therefore, we use the term “cement” to differentiate the
fuel efficiency and increasing our use of lower-carbon products. The above considerations are discussed in
alternative fuels, reducing total air emissions, and greater detail below in “Understanding Blending and the
convincing customers to switch to lower GHG-intensive Impact of Fuel Choice”.
Portland Limestone Cement or PLC. In fact, since 2008, we
have invested more than $1 billion to upgrade our Texas “As a result of these efforts, we
cement operations, including replacing “wet process”
cement production with modern pre-calciner technology, have successfully reduced the
installing state-of-the-art emissions control equipment and carbon intensity of our Midlothian
completion of our finish mill and silo project at our
Midlothian Cement Plant. We believe our cement plant is plant to 0.550 net metric tonnes of
now among the most modern in the United States. CO e/metric tonnes of cement as
2
Not surprisingly, in 2015, the Company’s Midlothian of 2024 from the 2010 intensity of
Cement Plant was recognized by the USEPA as a high 0.846.”
performing, energy efficient facility following investments
in innovative air pollution control technologies and usage
of alternative fuels. While our carbon intensity is reported in terms of CO e
2
emissions including emissions from biogenic sources, our
Understanding Carbon Intensity emissions from our operations (if we excluded 24% of the
Calculations biogenic component, which is the potential average
percentage proposed by USEPA) would be 0.599, a 3.2%
As a result of these efforts, we successfully reduced the decrease. This is due to the fact that the use of alternative
fuels is significantly less incentivized in the U.S. (where we
carbon intensity of our Midlothian Plant to 0.550 net
operate) than in the European Union, including that
metric tonnes of CO e/metric tonnes of cement as of
2
2024 from the 2010 intensity of 0.846. This also places us biogenic sources are only partially credited in calculating
emissions required to be reported to the USEPA.
below the 2023 (the most recent year for which data is
available from the USEPA) U.S. cement industry average
e/metric tonnes of “This also places us below the 2023
intensity of 0.7274 metric tonnes of CO 2
cement (inclusive of biogenic GHG) and makes us one of the (the most recent year for which data
more carbon efficient cement producers in the United States.
2024 saw a 5.7% decrease in our intensity and a 210,000 is available from the USEPA) U.S.
metric tonne year over year reduction in Scope 1 GHG cement industry average intensity
emissions at our Midlothian Plant due to changes in our fuel of 0.7274 metric tonnes of
mix, various efficiency projects and the conversion to
Portland Limestone Cement production. This, combined with CO e/metric tonnes of domestic
2
the sale of the Hunter Plant resulted in a 51% reduction in cement and makes us one of the
Scope 1 emissions from our cement business year over year.
more carbon efficient cement
We report our cement business’ carbon intensity in terms producers in the United States.”
of metric tonnes of cement we produce (which is
comprised of clinker and certain blend materials) rather

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