Question

These are not the source of energy but also the major source of industrial chemicals. 

Wind and water

Coal and petroleum

Natural gas and CNG​

Answer 1

Answer:

Coal and petroleum is the answer

Answer 2

Explanation:

• Natural gas (also called fossil gas; sometimes just gas), is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium.[2] It is formed when layers of decomposing plant and animal matter are exposed to intense heat and pressure under the surface of the Earth over millions of years.[citation needed] The energy that the plants originally obtained from the sun is stored in the form of chemical bonds in the gas.[3]

Natural gas is a non-renewable[3] hydrocarbon used as a source of energy for heating, cooking, and electricity generation. It is also used as a fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals.

Natural gas has an effect on climate change; it is a greenhouse gas itself,[4] and creates carbon dioxide during oxidation. Natural gas can be used in place of coal, for example, to generate electricity, which may lower net carbon dioxide emissions in absence of carbon capture.

• Millions of years ago, plants used energy from the Sun to form sugars, carbohydrates, and other energy-rich carbon compounds that were later transformed into coal, oil, or natural gas. ... Although fossil fuels provide very high quality energy, they are non-renewable.
• Natural gas. ... Natural gas is a fossil fuel used as a source of energy for heating, cooking, and electricity generation. It is also used as fuel for vehicles and as a chemical feedstock in the manufacture of plastics and other commercially important organic chemicals. It is a non-renewable