Page 39 - 2021 Sustainability Report

ENVIRONMENTAL STEWARDSHIP

Greenhouse Gas Emissions

Overview

Scope 1 emissions are direct greenhouse (GHG) emissions that occur from sources that are controlled or owned by an
organization (e.g., emissions associated with fuel combustion in boilers, furnaces, vehicles). Scope 2 emissions are
e emissions associated with the purchase of electricity, steam, heat, or cooling. Although Scope 2
indirect CO 2
emissions physically occur at an offsite facility where they are generated, they are accounted for in an organization’s
GHG inventory because they are a result of the organization’s energy use. Last year we reported for the first time on
our Scope 2 CO e emissions for all business lines: aggregates, cement, ready mixed concrete, asphalt and paving
2
services and magnesia specialties. This year we are announcing goals for reducing or offsetting our Scope 2 emissions.
This is in addition to our existing Scope 1 CO e emissions reduction commitments for our cement and magnesia
2
specialties businesses.
Martin Marietta is, overwhelmingly, an aggregates-led Company (crushed stone, sand and gravel) in terms of our
revenue and operational footprint. In fact, the vast majority of our facilities are associated with our aggregates
business, including more than 350 quarries, mines and distribution yards. Construction aggregates businesses are not
large emitters of GHGs, with the predominant source being diesel fuel used in trucks and other mobile equipment. We
also have two targeted downstream businesses: ready mixed concrete and asphalt and paving services. Finally, we
operate a small, but strategic, cement business and a magnesia specialties business that, collectively, account for 88
percent of our Scope 1 GHG emissions.

2021 GHG for All Business Lines 1

Scope 1 4.547 million metric tonnes CO e Scope 2 0.553 million metric tonnes CO e
2
2

Select Examples of Number of Cement Plants Worldwide

270

142
94
56
54 43 31
2
Lafarge Holcim Heidelberg China Nat Mat CEMEX CRH Votoranim Buzzi Cement Martin Marietta

Sources: 2019 annual reports, sustainability reports and corporate websites
Not surprisingly, our total GHG footprint in absolute terms — from our heritage cement operations as well as all our other
business lines — is a small fraction of the footprint of many domestic and international cement companies. Our 2021
e emissions were 4.547 million metric tonnes of CO e across all business lines (including stationary and
Scope 1 CO 2 2
mobile sources), of which 2.7 million metric tonnes were attributable to emissions from our cement business. Even if we
were to include in our totals the 2021 GHG emissions from the two cement plants acquired from Lehigh Hanson and now
held for sale, our total Scope 1 cement footprint would have only increased a reported 1,069,881 million metric tonnes of
CO e, which still places us at a fraction of the emissions of our larger competitors.
2

1 The Scope 1 GHG totals do not include any of the assets acquired in October 2021 and held for sale in 2022 due to our short period of ownership.

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