oil and coal coal and solar energy geothermal energy and oil solar energy and geothermal energy
I gave my students this multiple choice question: All energy resources have benefits, risks, and drawbacks. Which two resources present the most dangerous risks and consequences for the environment during their acquisition?

Only one answer is correct among these 4 choices:
- oil and coal
- coal and solar energy
- geothermal energy and oil
- solar energy and geothermal energy

Could you tell me which one is correct?

oil and coal