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Energies and Resources

Energy resources are necessary for any society, be it one dependent on subsistence farming or a developed country. There are many different sources of energy, some familiar such as coal or petroleum, others less so, such as tides or the heat inside the Earth.

Energy resources contain the fossil energy resources crude oil, natural gas and coal as well as nuclear fuels and renewable energy, as well as deep geothermal energy. They are crucial for our daily lives and the economy as a whole. Energy resources produce power and heat, can be used as transport fuel, and are recycled into a large number of products. The reliable and continuous provision of energy is a necessary requirement for the proper functioning of today's modern societies.

Energy sources can be classified into two types: nonrenewable and renewable. Nonrenewable resources, such as fossil fuels and nuclear material, are removed from the earth and can be depleted. These resources have been the most used type of energy in the modern era.

Renewable resources, such as wind, water, solar, and geothermal, come from sources that restore as fast as they are consumed and are endlessly available. Some, such as bio fuel produced from food crops and other plants, are refilled every growing season. In the early part of the twenty-first century, renewable sources have become more well-liked as nonrenewable sources have begun to be depleted.