Exhibit 99.1 GFL Environmental Inc. Unaudited Interim Condensed Consolidated Financial Statements For the three and six months ended June 30, 2023 F-1 GFL Environmental Inc. Unaudited Interim Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (In millions of dollars except per share amounts) Three months ended Six months ended June 30, June 30, Notes 2023 2022 2023 2022 Revenue 11 $ 1,943.6 $ 1,707.5 $ 3,742.7 $ 3,108.9 Expenses Cost of sales 1,590.6 1,482.0 3,145.2 2,747.6 Sell ...