Humans need energy to power their homes, businesses, and vehicles. Which of the following is a nonrenewable resource that is burned to provide humans with energy? A. trees B. the Sun C. water D. coal

D) Coal is one of the most effective sources of energy, but it isn't renewable, and expels a lot of CO2.

Trees aren't nearly as effective. Go ahead and try to cram an entire tree into your oven as opposed to a small flammable rock.

Coal, because it's is a rock that gives off fossil fuels.