Oil and natural gas are collectively referred to as why energy.

Best answer: Fossil energy. It is a mixture of hydrocarbons or hydrocarbon derivatives. Fossil fuel is a non-renewable resource, which is formed by the remains of ancient creatures after a series of complex changes. Petroleum can be processed into various fractions, including natural gas, gasoline, naphtha, kerosene, diesel oil, lubricating oil, paraffin and many other derivative products. It is the most important liquid fuel and chemical raw material.

Oil is generally called fossil energy, which is a mixture of hydrocarbons or hydrocarbon derivatives. Fossil fuel is formed by the remains of ancient creatures after a series of complex changes, and is a non-renewable resource. Petroleum can be processed into various fractions, including natural gas, gasoline, naphtha, kerosene, diesel oil, lubricating oil, paraffin and many other derivative products. It is the most important liquid fuel and chemical raw material.

The oil-forming mechanism of petroleum includes two theories, namely, bio-sedimentary oil-changing and petrochemical oil-changing. The former is widely accepted, which holds that petroleum was formed by the long evolution of organisms in ancient oceans or lakes and belongs to bio-sedimentary oil-changing and cannot be regenerated. The latter thinks that oil is generated by carbon in the earth’s crust, which is irrelevant to biology and renewable. Petroleum is mainly used as fuel oil and gasoline, and is also the raw material of many chemical industrial products, such as solutions, fertilizers, pesticides and plastics.

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