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  • Professional design engineers discuss calculations to use pure natural energy and installing solar panels and wind turbines on the roof of houses to generate electricity, energy saving and global warming ideas. Puzzle #626181588
Professional design engineers discuss calculations to use pure natural energy and installing solar panels and wind turbines on the roof of houses to generate electricity, energy saving and global warming ideas. puzzle #626181588

  • - 3 sizes: 48, 500 & 1,000 pieces
  • - Durable, glossy-coated paperboard
  • - Full-bleed, photo-quality printing
  • - Storage box included

$39.95

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