Liquefied petroleum gas is a source of heat we use now. If you're asking for a natural source, its obvious; the sun.
heat and energy are the uses of carbohydrates. heat and energy are the uses of carbohydrates.
Two categories of heat sources are natural heat sources and artificial heat sources. Natural heat sources include the sun, geothermal energy, and volcanic activity. Artificial heat sources include electric heaters, gas heaters, and oil heaters.
The two types of thermal energy sources are Geothermal and Thermal Energy
Sources that can produce heat energy include fossil fuels like coal, oil, and natural gas, as well as renewable sources like biomass, geothermal, and solar energy. Heat energy can also be produced through nuclear reactions and by burning waste materials.
Sun is the source of heat. It also provides thermal energy.
The Sun
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The Sun or heat sources can be a greatideal energy source.
The Sun: The primary source of heat energy on Earth is the Sun, which emits electromagnetic radiation that warms the planet. Geothermal Energy: Heat energy derived from the Earth's internal heat sources, such as volcanic activity and geysers. Combustion: The burning of fossil fuels, wood, or other materials releases heat energy as a byproduct of the chemical reaction.
Radiant energy from the sun, kinetic energy and heat from the decay of radioactive material in the Earth's interior.
The four main sources of heat are the sun, geothermal energy from the Earth's core, friction from mechanical processes, and chemical reactions such as combustion.
wood, coal