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Across 4. Farming 8. Describing power from the sun 12. Change from a solid to a liquid 13. A greenhouse gas (Two words) 17. A greenhouse gas produced by cattle and farming. 18. A gas used for energy storage. 19. A fossil fue. 20. The top of a graph (or a mountain)

Down 1. A type of battery (Two words) 2. _________ and demand 3. Cars, buses, trains etc. 5. The up and down movement of seawater every 12 hours 6. A network of electric power lines 7. Electrical goods like microwave ovens, vacuum cleaners, washing machines etc. 9. A small, independent system of energy supply 10. Coal, gas and oil (Two words) 11. A system of energy storage (Two words) 14. Supply and _______ 15. The country with the most renewable energy 16. A dirty fossil fuel.