ENVIRONMENTAL DATA ENERGY DATA Appendix C 2021 Owens Corning Sustainability Report | Appendices | 307 Indirect Energy by Source Energy Efficiency Footprint  Absolute MWh  Absolute Percentage ― 2030 Goal Absolute MWh 10,719,236 10,274,193 9,658,731 10,499,961 Absolute Percentage 100 96 90 98 Aggregate Intensity (MWh Normalized by Revenue - In Millions) 1,501.53 1,429.38 1,363.96 1,232.78 ABSOLUTE MWH ABSOLUTE PERCENTAGE 20 40 60 80 100 12,000,000 10,000,000 8,000,000 6,000,000 4,000,000 2,000,000 2018 2019 2020 2021  Electricity 3,544,562 3,285,014 3,161,965 3,467,200  Steam, Heat, Cooling 6,305 6,057 6,581 6,886 TOTAL 3,550,868 3,291,072 3,168,546 3,474,087 Electricity Consumption by Source (in Megawatt Hours)  Renewable Source Electricity  Non-Renewable Sourced Electricity 2020 2019 2018 3,544,562 3,285,014 3,161,965 3,467,200 2021 1,842,115 1,637,326 1,521,634 1,701,722 1,702,447 1,647,688 1,640,331 1,765,478 2018 2019 2020 2021 MEGAWATT HOURS (IN MILLIONS) 4 3 2 1