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Emissions in Perspective 2019 Total Scope 1 + Scope 2 GHG Emissions Among Peers (1) (mmt CO2e) 18 Average 16 14 12 10 8 6 4 2 0 A B C D E F G Plains H (1) Peers based on Plains' 2020 Total Shareholder Return Proxy Group where data is available; Peer data in certain cases contains emissions from parent company activities which may not be directly comparable to our business. (2) Global Carbon Project, 2019 (3) U.S. EPA, 2019 (4) Includes Scope 1 and 2 emissions. Worldwide Emissions (mmt CO2e)(2) 43.100 Energy & Non-energy Sources 36,800 Energy Sources U.S. Emissions (mmt CO2e)(3) 6,600 Energy & Non-energy Sources 5,400 Energy-related Plains Emissions (mmt CO2e)(4) 2 26

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