Mongabay: Migros, Switzerland’s largest supermarket chain, will lodge a formal complaint against Malaysia’s IOI Group after the palm oil grower was linked to illegal forest-clearing and encroachment on indigenous lands, reports the Bruno Manser Fund. Migros said it would ask IOI’s conduct to be investigated by the Roundtable on Sustainable Palm Oil (RSPO), a certification body that sets standards for greener palm oil production. IOI is Migros’ largest palm oil supplier. “This matter must …