Yes, I do think that all the energy which finds its origin from various sources is a culmination of the energy produced by the sun. Here is the logic behind this statement: Solar Energy: The most direct source of energy that directly comes from the Sun is solar energy itself. Plants capture sunlight using photosynthesis to convert them into chemical energy stored in the form of glucose. This chemical energy forms the basis for most food chains and energy flows in ecosystems. Fossil Fuels (Coal, Oil, and Natural Gas): These energy sources are also derived from the Sun, though indirectly. Fossil fuels are formed from the remains of ancient plants and animals. Plants, as mentioned earlier, obtain energy from the Sun to grow. When these plants and animals die, their organic matter gets buried and, over millions of years, transforms into fossil fuels. Therefore, the energy in fossil fuels was originally solar energy, produced by photosynthesis. Wind Energy: Wind is generated by the Sun's uneven heating of the Earth's surface. The Sun heats up different parts of the Earth, causing air to move and create wind. This wind energy can be captured using wind turbines. Hydropower or Water Energy: Water cycles are powered by the Sun. The Sun's heat causes evaporation, which eventually leads to the formation of clouds and rainfall. Water flowing in rivers and streams, used in hydropower plants, originates from rainwater that is part of the Earth's water cycle, driven by solar energy. Biomass Energy: Another source of energy is biomass which includes wood, crop residues, or animal wastes. Like the fossil fuels, plants grow converting solar energy to chemical energy in the process known as photosynthesis. When those plants are combusted for energy, they yield that stored solar energy. Geothermal Energy: Although geothermal energy is derived from the internal heat of the Earth, it is indirectly affected by solar energy. Solar energy heats up the Earth's atmosphere and surface, which in turn causes heat transfer processes that eventually affect the geothermal systems in some areas. In a nutshell, the Sun is the primary source of most energy forms on Earth: direct sources of solar energy and photosynthesis, and indirect sources of fossil fuels, wind, and hydropower. Although some sources, such as geothermal energy, are derived from Earth's internal heat, the majority of energy we utilize today has its origin in the sun.