2021 Owens Corning Sustainability Report | Reducing Our Environmental Footprint | Air Quality Management | 165 In 2021, we saw a 3% increase in absolute NOx emissions from 2018 baseline metrics, while aggregate intensity decreased 14%. In 2021, we saw a 4% reduction in absolute SOx emissions from 2018 baseline metrics, while aggregate intensity decreased 19%. SOx Emissions Footprint  SOx Emissions  Aggregate Intensity Percentage 2018 2019 2020 2021 Absolute Metric Tons 2,079 1,921 1,682 2,001 Aggregate Intensity Percentage 100 92 82 81 Aggregate Intensity (Metric Tons Normalized by Revenue, in Millions) 0.291 0.267 0.238 0.235 AGGREGATE INTENSITY PERCENTAGE 500 1000 1500 2000 2500 3000 20 40 60 80 10 0 12 0 ABSOLUTE METRIC TONS 2018 2019 2020 2021 Absolute Metric Tons 1,967 1,921 1,666 2,027 Aggregate Intensity Percentage 100 97 85 86 Aggregate Intensity (Metric Tons Normalized by Revenue, in Millions) 0.276 0.267 0.235 0.238 NOx Emissions Footprint  NOx Emissions  Aggregate Intensity Percentage ABSOLUTE METRIC TONS AGGREGATE INTENSITY PERCENTAGE 500 100 0 150 0 200 0 250 0 300 0 20 40 60 80 10 0 12 0