Across
- 2. A black rock used to make electricity.
- 5. When something lets out gas or smoke into the air.
- 6. Something that is not easy or causes problems.
- 7. Something that stores energy to make gadgets or cars work.
Down
- 1. Dirt or waste that makes the air, water, or ground dirty.
- 3. A type of fuel for cars.
- 4. Digging in the earth to find rocks or minerals.
- 5. Energy that makes things work, like lights and TVs.