The Truth Behind the Surge in Clean Energy Investment: The Dilemma of Fossil Fuel Waste

International Energy Agency (IEA) released its *World Energy Investment 2026* report on May 28, 2026, revealing a striking trend: global clean energy investment reached $2.2 trillion in 2025, nearly twice the $1.2 trillion invested in fossil fuels. This data seems to suggest that the global energy transition is accelerating. However, a deeper analysis reveals that behind this investment boom lies a deeper contradiction in the energy system—fossil fuels, despite falling behind in the investment race, still dominate global energy consumption, and the reason lies in a widely overlooked truth: enormous energy waste.

The Reality Behind the Investment Data

Clean energy, as defined by the IEA, includes solar, wind, nuclear, grid-scale battery storage, and grid upgrades. The investment gap is not a short-term phenomenon; it has persisted for the past decade. Yet fossil fuels still account for about 80% of global final energy consumption, including electricity, transportation, heating, and industry. This seemingly contradictory situation stems from two key factors: the extremely low efficiency of the fossil fuel system and the massive scale of government subsidies.

The Efficiency Trap of Fossil Fuels

In an article published in *Forbes* on June 7, 2026, Ingmar Rentzhog, CEO of *We Don't Have Time*, pointed out the astonishing waste in the fossil fuel system. According to data from the Rocky Mountain Institute (RMI), out of 606 units of primary energy that entered the global system in 2019, only 227 units were converted into useful energy (such as heat, power, and lighting), giving the overall system an efficiency of just 37%. This means nearly two-thirds of the energy is wasted before generating any value. RMI estimates this waste amounts to over $4.6 trillion per year, roughly $600 per person globally.

Rentzhog emphasized that fossil fuel waste permeates the entire value chain: extraction and refining processes waste about 51 exajoules per year; transportation—nearly half of global shipping demand is solely for moving fossil fuels—further consumes vast amounts of energy; pipeline transport requires pumps and compressors, and leaks occur along the way. This energy is never used to heat homes or move passengers; it merely sustains the operating costs of a "dig-transport-burn" system.

Competition Distorted by Subsidies

Despite the lead in clean energy investment, the playing field is not level. Governments worldwide continue to provide massive subsidies for fossil fuels, including consumer price support and tax breaks. Rentzhog acknowledged that accurately comparing net investment between the two is difficult because clean energy subsidies are often already included in total investment figures, while fossil fuel subsidies do not account for environmental and health damage costs. Even so, when subsidies are included, total spending on clean energy still nearly doubles that on fossil fuels.

Efficiency Advantage of Renewable Energy## Efficiency Advantage of Renewable Energy

Compared to the wastefulness of fossil fuels, renewable energy offers a fundamental efficiency advantage. Rentzhog points out that sunlight and wind do not need to be mined, refined, or transported. RMI research shows that wind and solar power generation has almost no losses because they require no extraction or processing of energy, nor do they suffer from the thermal losses of fossil fuel power plants. Rooftop solar panels transmit energy through just a few meters of wire, and the fuel (sunlight) arrives for free automatically every day.

Combustion losses also disappear: coal-fired power plants emit about 60% of their energy as waste heat from cooling towers; gasoline cars waste about three-quarters of their fuel before the wheels even turn. Meanwhile, clean alternatives accomplish the same tasks with far less input: heat pumps provide heat by moving it rather than burning, using about a quarter of the energy of fossil fuel heating; electric motors convert nearly all electrical energy into motion. According to IEA efficiency analysis, electrified technologies are typically 2 to 4 times more efficient than the fossil fuel equipment they replace.

The Transition Is Not a One-for-One Replacement

"We don't need to find 606 units of clean energy to match current fossil fuel supply," Rentzhog writes. "We need to provide 227 units of useful services, and clean electricity delivers each unit with far less energy input. The transition is not a one-for-one replacement of one fuel with another, but a replacement of wasteful systems with efficient ones. This also explains why in the IEA's net-zero scenario, total global energy demand can decline even as the world grows wealthier and uses more energy services—the same comfort, mobility, and lighting, with less waste. The fossil fuel share appears unshakeable only if one assumes every wasted joule must be replaced."

The Economic Logic of Investment Flows

Investors put money into clean energy not just because of low emissions, but because it provides the same comfort, mobility, and lighting with less energy purchased, transported, and burned. This is a bet on lower costs and lower risks, not a bet on low emissions. Rentzhog emphasizes that building infrastructure takes time—wind farms, transmission lines, or battery factories require years of financing, permitting, and construction. Today's investment figures are not just a snapshot of the present, but the construction orders of the 2030s: a wind farm approved today will still generate power in the 2050s; a transmission line financed this year could carry electricity into the next century. The IEA notes that about three-quarters of current energy investment is already locked in by previous decisions. The future energy system is not a distant vision; much of it is already under construction.

Energy Security and Independence

Clean energy also brings significant energy security benefits. Events like the blockade of the Strait of Hormuz have clearly demonstrated the vulnerability of fossil fuel supply. Since sunlight and wind require no shipping, countries developing renewable energy can substantially reduce their exposure to the next price shock or blockade. The IEA estimates that in 2025, clean energy and efficiency measures will save five major fuel-importing regions about $260 billion in fossil fuel import costs. This is not just a climate benefit—it's energy independence.

Challenges and Policy ContradictionsDespite optimistic investment trends, the energy transition still faces significant challenges. First, there is a contradiction in government policies: countries continue to spend hundreds of billions of dollars subsidizing fossil fuels, even defending the side that is losing the investment race, while slowing down the deployment of cleaner, safer, and increasingly cheaper clean energy. Rentzhog believes that these funds should be used more effectively to address the real bottlenecks—grids, energy storage, accelerating permitting, skills training, and providing low-cost capital for developing countries.

Second, the inertia of the fossil fuel system is enormous. Existing infrastructure, employment dependencies, and vested interests constitute resistance to the transition. The system's inefficiency is partly due to historical path dependence, but change requires time and political will.

Future Outlook

Looking ahead 5 to 20 years, the global energy system will undergo profound changes. Continued leadership in clean energy investment will accelerate renewable energy installations, grid upgrades, and energy storage deployment. As technology costs decline and economies of scale take effect, the economics of clean electricity will further improve. It is expected that by the 2030s, clean energy will dominate new electricity capacity additions, and the adoption of electric vehicles and heat pumps will gradually reduce the share of oil and natural gas in transportation and heating.

However, the pace of transition depends on policy support and infrastructure investment. Grid modernization, energy storage capacity expansion, and permitting reform will be key. The global energy landscape will shift from a centralized fossil fuel system dominated by a few resource-rich countries to a distributed system based on electricity and renewable energy. Energy security will depend more on domestic resources and technological capabilities than on geopolitical stability.

In the end, capital has already made its choice: global investment is flowing at nearly a 2:1 ratio toward the cleaner, more electrified, more localized side. As Rentzhog said, "The scandal is not that fossil fuels are losing the race, but that we are still spending so much money to keep them on the track." The future of the energy system is being built, and efficiency will be the core criterion that defines winners.