297163document96395OPEC Energy Review - 2021 - Komendantova - On the crossroad renewable energy sources or oil shale Understanding patterns.pdfapplication/pdf87dcd05a108f89588b41e1ecdc9f3fdcMD516704702021-12-14 09:55:06https://pure.iiasa.ac.at/id/eprint/17706/1/OPEC%20Energy%20Review%20-%202021%20-%20Komendantova%20-%20On%20the%20crossroad%20%20%20renewable%20energy%20sources%20or%20oil%20shale%20%20Understanding%20patterns.pdf