 ST HELIER, Jersey, July 28, 2021 GLOBE NEWSWIRE -- Caledonia Mining Corporation Plc Caledonia or the Company NYSE AMERICAN: CMCL; AIM: CMCL announces that it has today published its 2020 Environmental, Social and Governance ESG Report, which covers the reporting period 1 January 2020 to 31 December 2020.This report is focused on Caledonias only operating project, the Blanket Mine in Zimbabwe. 