Which one of the following represents the use of a nonrenewable primary energy source?
using the energy of falling water to turn a mill, which grinds corn into cornmeal heating a cabin in the winter using coal using a windmill to pump water out of the ground using coal to generate electricity, which is used to heat a home
The options that represent the use of a nonrenewable primary energy source are:
Both of these options involve the use of coal, which is a nonrenewable energy source. The other options involve renewable energy sources (falling water and wind).