What are the related variables and static factors that affect energy use?

Relevant variables and static factors affecting energy use include:

* Market supply and demand: Market supply and demand is one of the important factors affecting energy use. When the supply exceeds the demand, the energy price will decrease, and vice versa.

* Changes in energy varieties: Different energy varieties have different characteristics, such as price, reliability and sustainability. With the continuous development of science and technology and the improvement of environmental awareness, the types of energy are constantly changing, such as the popularization of renewable energy and the progress of nuclear energy technology.

* Product variety and output change: product variety and output directly determine energy demand. The production process of products needs to consume a lot of energy, so the change of product variety and output will have an impact on energy use.

* Weather: Weather is one of the important factors affecting energy use. For example, cold winter and hot summer will increase the demand for heating or cooling, thus increasing energy consumption.

In addition to the above static factors, there are also some dynamic factors that will also affect the use of energy, such as economic situation, policies and regulations, technological progress and so on. The changes of these factors may have long-term or short-term effects on energy use, which need to be considered comprehensively.