What is the importance of energy?

Energy has always been a prerequisite for human civilization. Throughout history, all the activities of human society are inseparable from energy, from food, clothing, housing and transportation, to culture and entertainment, are directly or indirectly consume a certain amount of energy.

Energy is the material basis for the survival and development of human society, and has a particularly important strategic position in the national economy. Energy is equivalent to the blood of the city, which drives the operation of the city.

The more modernized the city is, the stronger the dependence on energy, because energy is important in maintaining the following functions: lighting, transportation, food and beverage, heating, cooling, automated management systems _ points.

Expanded Information:

Energy can be divided into three main categories according to its source: energy from the sun. This includes energy that comes directly from the sun (e.g., solar thermal radiation energy) and energy that comes indirectly from the sun (e.g., combustible minerals such as coal, petroleum, natural gas, oil shale, and biomass such as fuelwood, hydroelectric energy, and wind energy).

Energy from the Earth itself. One is geothermal energy contained within the Earth, such as underground hot water, underground steam, and dry hot rock bodies; the other is atomic nuclear energy contained in nuclear fuels such as uranium and thorium within the Earth's crust. Energy generated by the gravitational pull of celestial bodies such as the moon and the sun on the Earth, such as tidal energy.?

Baidu Encyclopedia - Energy