Internationalism No. 88, June 2026 Page 15 From the series The world energy battle The war against Iran has highlighted the dependence on fossil fuels and the need for world economies to reduce dependence on the Middle East and on these energy sources. The European Union's “Green Deal” aims to achieve these goals, but the structure of the economy and the economic and social costs pose significant obstacles for the energy transition. Problems of renewables versus fossil fuels According to the International Energy Agency (IEA), during the period 2015-2024 global cumulative investments in renewable energy production amounted to $12.5 trillion, surpassing the $11.8 trillion invested in fossil fuels; despite this, the share of total energy supply accounted for by fossil fuels fell only from 85% in 1990 to 81% in 2023 [United Nations, Energy Statistics Pocketbook 2...