63There is an economic logic underlying the scheme that encourages a participant in the scheme to emit quantities of greenhouse gases that are less than the allowances originally allocated to it, in order to sell the surplus to another participant which has emitted more than its allowance (see, inter alia, judgments of 8 March 2017, ArcelorMittal Rodange et Schifflange, C‑321/15, EU:C:2017:179, paragraph 22; of 22 February 2018, INEOS Köln, C‑572/16, EU:C:2018:100, paragraph 27; and of 28 February 2018, Trinseo Deutschland, C‑577/16, EU:C:2018:127, paragraph 40).
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