Page 24 - 2019 Sustainability Report

Put succinctly, we are a very small contributor to 15 percent of our consolidated revenue in 2019. This is in
the Scope 1 CO e emissions attributed to the global stark contrast to other operators in the cement sector who
2
cement sector. This is consistent with the fact that our have a substantially greater number of cement plants, total
cement operations represent a small share of our overall Scope 1 GHG emissions, and percentage of their revenue
business. In fact, those operations, together with our derived from such cement operations.
Magnesia Specialties business, accounted for approximately

Martin Marietta Aggregates, Concrete and Asphalt Plants Martin Marietta Cement Plants

OUR CEMENT BUSINESS

Cement and aggregates are critical components of approach that takes into account the environmental impacts
building materials, such as concrete, in the construction of embodied carbon during the entire life cycle of cement
and maintenance of roads, buildings, bridges and other and concrete building materials (including materials sourcing,
infrastructure assets that are vital to economic growth and distribution, use, productive reuse, recycling and disposal)
quality of life. While it is well known that the cement sector means that cement and concrete products can play an
is a significant contributor to global GHG emissions, a holistic important role in a sustainable low-carbon economy.

OVERVIEW OF CEMENT MANUFACTURING PROCESS

1 Limestone and other raw
materials quarried

2 Raw materials are ground and
blended

3 Raw materials are heated
to 2,850° F in a kiln

4 Heat transforms the materials
into pellets of “clinker”

5 Clinker is ground with gypsum
1 5 6 into a fine gray powder to make
cement

6 Cement is stored and shipped
via truck or rail

7 Primary end use consumption
is concrete

24 / MARTIN MARIETTA / SUSTAINABILITY REPORT / 2019