The natural resources used by society are limited by various factors. why is coal considered a nonrenewable resource? a. once coal is used up, it can never be replaced. b. coal is a nonrenewable resource, because it comes from the impact of meteors with the earth. c. coal was a renewable resource, until it was mismanaged by humans. d. coal is considered a nonrenewable resource, because it takes millions of years to form.

The correct answer is (d) Coal is considered a nonrenewable resource, because it takes millions of years to form.

A nonrenewable resource is a resource with high economic value. Most of the fossil fuel such as oil, coal, natural gas are considered as non renewable resources because their formation takes billions of years and there use is not sustainable. Coal is formed from the dead remains of plants and animals buried deep inside the earth for millions of year. The time taken by coal to form is much so it is not considered as non renewable resources.

a

explanation:

because it is and it's just life man

answer; ///(b) it is composed of four protein chains and four heme groups;