solar

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Across
  1. 2. the strength and vitality required for sustained physical or mental activity.
  2. 3. fuels, like coal or natural gas, that are made of decayed plants and animals
  3. 6. energy given off by the sun’s rays
Down
  1. 1. energy produced by natural resources that cannot be used up, such as the wind or sun
  2. 4. panel designed to absorb the sun's rays as a source of energy for generating electricity or heating
  3. 5. devices that convert sunlight into electricity