European Union – Environment. Article 3(h) of Commission Decision 2011/278/EU did not preclude national legislation, such as that at issue in the main proceedings, which excluded from the concept of 'process emissions sub-installation', within the meaning of that provision, greenhouse gas emissions stemming from the combustion of incompletely oxidised carbon in a liquid state. The Court of Justice of the European Union gave a preliminary ruling to that effect in proceedings concerning the rejection of the applicant company's application for a free allocation of greenhouse gas emission allowances in so far as that application concerned emissions stemming from the combustion of incompletely oxidised carbon contained in liquid waste.