Q1 2022 & FY 2021 Results

D SUPPORTED BY SUSTAINABILITY INITIATIVES RESULTING IN DIRECT ECONOMIC AND ENVIRONMENTAL BENEFITS 8.9% ALTERNATIVE FUELS (AF) USAGE AND CO2 EMISSIONS REDUCTION¹ 10.0% 8.8% 8.5% 8.1% AF USAGE BY PLANT 33% 27% 24% 18% 16% 12% 38% 38% 27% GCC 21% 11% 11% 10.4% 10.9% 9.1% 9.1% 11.5% Samalayuca Chihuahua Juarez Pueblo 2018 -2019 ■2020 2016 2017 2018 2019 2020 % AF/thermal energy CO2 emissions reduction ALTERNATIVE FUELS USAGE (MT) AF PROVIDE SIGNIFICANT COST ADVANTAGES In 2020, AF provided 11.5% of total thermal energy and reduced CO2 emissions by 10% In 2018, GCC saved more than US$4 million using AF . On average, AF costs are 50% lower than coal costs 81k 78k 78k 88k In 2019, GCC received permit to co-process AF at Rapid City 65k . In 2018, GCC expanded the Pueblo plant's AF capability 2016 2017 2018 2019 2020 12005 is the baseline year for CO2 emissions reduction In 2017, GCC secured a flexible fuel-permit for Odessa Tijeras fuel permit is in the final stages 34 44

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