Perfect for beginners with simple, common vocabulary
Harnessing Nature’s Clean Power Sources
Moderate difficulty suitable for most players
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Across
- 1. Prefix relating to water-based energy generation
- 2. Energy derived from the sun’s rays
- 4. Machine that converts kinetic energy from wind or water into electricity
Down
- 3. Heat energy sourced from beneath the Earth’s surface
- 5. Organic material used as renewable fuel
- 6. Adjective describing places suitable for harvesting kinetic air energy
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