This textbook is the main line to the relationship between energy and the environment can be divided into two parts. The first part introduces the energy classification, energy and socio-economic development of the relationship between coal, oil, natural gas and hydropower resources of traditional energy resources, production and consumption situation, and nuclear, solar, geothermal, wind, ocean the status of resources and energy, tidal energy, biomass, hydrogen and natural gas hydrates and other new energy development and utilization of technology, and then focus on the basic principles of energy conversion and storage, energy systems analysis methods and industrial processes, energy-saving ways and means; part of the focus on energy conversion and utilization process of the environmental pollution control issues to discuss details of combustion pollution control technology and air pollution control technology.
The so-called energy, directly or after conversion some energy natural resources. "Modern Chinese Dictionary", the annotations are material to produce energy, such as fuel, hydro, wind and other "energy. The "Encyclopedia Britannica" for energy interpreted as "energy is a term including all fuel, water, sun and wind, and appropriate conversion means to provide the energy required" to humanity. In addition, a variety of energy-related books and some other description, but whatever the description of its content are basically the same, that is, energy is the energy source to provide energy resources.
In nature, there are some natural resources have some form of energy under certain conditions, they can be converted into energy needed by the people in the form of this natural resource is known as energy, such as coal, oil, natural gas, solar, wind, hydropower, geothermal energy, nuclear energy, and so on. However, in the production and living, work or easy to transport and use of other reasons, often the above-mentioned energy after a certain amount of processing, conversion, making it more in line with the conditions of use of energy, such as gas, electricity, coke, steam, methane such as hydrogen, they are also known as energy, because they also provide the necessary energy for people.