 OMAHA, Neb., Nov. 30, 2021 GLOBE NEWSWIRE -- Green Plains Inc. NASDAQ:GPRE today announced that it will participate in three upcoming investor conferences: Jefferies Virtual Alternative Protein Related ESG Summit, Dec. 1, 2021; Stephens Annual Investment Conference, Dec. 2, 2021; and BMO 2021 Growth ESG Conference, Dec. 8, 2021. 