Moderate difficulty suitable for most players
Sustainable Energy Sources Exploration
Moderate difficulty suitable for most players
1
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3
4
5
Across
- 1. Energy derived from the Earth's internal heat
- 2. Type of nonrenewable fuel formed from ancient remains
- 4. Renewable power generated by moving air
Down
- 3. Organic material used as a renewable fuel source
- 5. Element used as fuel in nuclear reactors
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