Biogas is a natural resource?
The two energy does not belong to natural resources, it is a primary energy through processing into another form of energy. Biogas is belong to two energy, which is composed of straw into the!
Primary energy is the energy that human beings get directly from nature, without changing their basic forms, such as coal, oil, natural gas and so on
Not natural resources. Is a kind of energy. Energy is the only source of natural resources
