Perfect for beginners with simple, common vocabulary
Harnessing Winds and Solar Sparks
Moderate difficulty suitable for most players
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Across
- 2. Lightest element used as a clean fuel alternative
- 3. Device that converts wind or water flow into electricity
- 4. Energy harvested from Earth's internal heat
Down
- 1. Particle of light essential in solar energy conversion
- 5. Measure of energy output compared to input
- 6. Renewable energy source derived from organic material