Kesko's grocery trade, Gasum, Myllyn Paras and Wursti have entered into cooperation where biogas produced from biowaste collected from retail stores will be utilised as energy in the manufacture of new Pirkka products. HELSINKI, 2015-9-8 — /EPR Retail News/ — In the initial stage, two manufacturers of Kesko's own-brand Pirkka products – Myllyn Paras and Wursti…