A: In 2025, investment in clean technologies such as renewables, nuclear, electricity grids, storage, low-emissions fuels, efficiency measures and electrification, is projected to hit $2. Fossil fuel investment into oil, natural gas and coal is expected to total. The world now invests almost twice as much in clean energy as it does in fossil fuels. billion USD (2023, MER) IEA. 0 Global energy. BloombergNEF's Energy Transition Investment Trends reviews annual investment figures in the global energy transition, including spending to deploy clean technologies, investment in the clean energy supply chain, equity investment in climate-tech companies, and debt issuance for energy transition. Global energy investment is set to reach an unprecedented $3. 3 trillion in 2025, according to the International Energy Agency's latest World Energy Investment report.