Page 29 - 2019 Sustainability Report

OUR AGGREGATES AND DOWNSTREAM BUSINESSES

In our aggregates product line, which is the largest of mobile combustion sources, including off-road and on-
our businesses, the primary source of our Scope 1 CO e road equipment. These downstream businesses also use
2
emissions is the consumption of diesel fuel in our quarry natural gas in their processes, and those emissions, while
operations. The same is largely true of some of our considerably smaller than their diesel-related emissions, are
targeted downstream operations, namely ready mixed included in the total carbon footprint provided in this report.
concrete and asphalt and paving services, that have similar
Scope 1 GHG Emissions (in metric tonnes)
1
Aggregates and Targeted Downstream Businesses
534
Metric Tonnes of Scope 1 GHG Emissions (x 1,000) 468 479 502
502
479
468
534

2017
2018
2016
2019
2016 2017 2018 2019
1
Scope 1 GHG Emissions Financial Performance Ratio
Metric Tonnes of Scope 1 GHG Emissions / $M in product and services revenue 157.6 154.4 151.1 144.5

154.4
157.6
151.1
144.5

2016
2017
1 Scope 1 GHG Emissions = Direct emissions, less transportation and international operations. 2018 2019
2016 2017 2018 2019
In an effort to mitigate the risks to the company associated Our strategy includes:
with GHG emissions while ensuring and improving financial
sustainability, we have made significant capital investments Using alternative fuels such as biodiesel
in our mobile fleet in both the aggregates and targeted Reducing overall fuel use by converting
downstream businesses. We have also invested significant from quarry trucks to conveyor belt systems
capital to right-size our operations, which can result in an
operation using fewer pieces of equipment and, for the Right-sizing quarry trucks to marry the appropriately
aggregates business, shorter haul distances from the mine to sized truck with the size of production to reduce the
the crushing plant. number of required trips

Replacing older rail cars with more efficient,
“In an effort to mitigate the risks to the high-capacity models that reduce the number
company associated with GHG emissions of required trips and adding rail capacity in
while ensuring and improving financial lieu of truck movements
sustainability, we have made significant
capital investments in our mobile fleet Installing emissions monitoring equipment
at both the aggregates and targeted and real-time fleet management software
downstream businesses.”

Notably, like our Magnesia Specialties business, our aggregates business also produces material that is used by others to
reduce emissions. For example, our limestone aggregate operations produce substantial quantities of scrubber stone sold to
power producers for use in reducing the sulfur dioxide (SO ) emissions generated by their coal-fired plants. As noted earlier,
2
our aggregates production — although it represents the majority of our facilities and consolidated revenue —
has a small direct GHG emissions footprint.

29 / MARTIN MARIETTA / SUSTAINABILITY REPORT / 2019