Among the various types of energy, renewable energy is one of the other types and it comes as a sub category of sustainable energy. Wind, wave power, flowing water and biological processes as anaerobic digestion and geothermal heat flow are all natural processes and renewable energy is one of the sources that captures its energy from the above mentioned flows of different types of energy.
Solar energy basically is one of the main sources through which renewable forms of energy is derived. Some of the examples to its form is energy that is extracted from biomass is derived from a plant material that is produced due to photosynthesis, with the help of the sun. Wind energy is derived from winds and it goes on and on.
Most importantly it is very important to known the historical use of renewable energy since it is very relevant for today.
Wood which is one of the important source and it was one of the energy sources in human history which has been used as a thermal energy source in the form of burning and it is still important even today. Burning wood was considered of high importance during cold climate because of the heat that was radiated through it and it proved useful and even today it is used in countries that have cold weather. Charcoal is one of the other examples because it was discovered that the partial combustion of wood in the absence of oxygen produces charcoal. Charcoal proves to be a boon today because of its compact and portable energy source.
Animal power, it is known since the history that horses and oxen are not only known to provide transportation but also they are known to provide powered mills. Animal traction is the source to produce animal power for vehicle and mechanical devices.
Human power is one of the largest useful source of energy, over the years humans have strived and generated energy in forms working hard whether it was a forced bondage or indentured servitude but they have been known and are still known to be the hard workers. When we see the Egyptian pyramids we know that it was only possible through human power. It is said that even today bicycling is one of the greatest human power today and it is the most energy efficient means of transportation.
Water power, it is known fact even today that hydro electricity is one of the least expensive methods of storing and generating dispatch able energy throughout the world. It provides maximum renewable energy than the other renewable sources.
Animal oil, Wind power and solar power do all fall in the same category of renewable energy and they are remarkably known today for their usage in the world. They are distinctive from each other but yet are important in its own forms
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