Question

How are carbon atoms used on earth?

Answer 1

Carbon as coal is still a major source of fuel worldwide, providing about 30 percent of energy worldwide

Step-by-step explanation:

Answer 2

Carbon is used in some way in most every industry in the world. It is used for fuel in the form of coal, methane gas, and crude oil (which is used to make gasoline). It is used to make all sorts of materials including plastics and alloys such as steel (a combination of carbon and iron).