RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 18, ES4002, doi:10.2205/2018ES000625, 2018 ![]() Figure 2. Evolution of primary energy shown as absolute contributions by different energy sources (EJ). Biomass refers to traditional biomass until the most recent decades, when modern biomass became more prevalent and now accounts for one-quarter of biomass energy. New renewables are discernible in the last few decades [GEA, 2012]. Copyright 2018 by the Geophysical Center RAS. Generated from LaTeX source by ELXpaper, v.1.5 software package. |