Media type: E-Article Title: Theory without practice: a reply to the note from Heijungs on the average versus marginal debate in Life Cycle Impact Assessment Contributor: Huijbregts, Mark A. J.; Hellweg, Stefanie; Hertwich, Edgar G. Published: Springer Science and Business Media LLC, 2021 Published in: The International Journal of Life Cycle Assessment, 26 (2021) 11, Seite 2192-2195 Language: English DOI: 10.1007/s11367-021-01970-6 ISSN: 1614-7502; 0948-3349 Origination: Footnote: