New, energy-efficient technologies for sustainable production Before  After Company name: Γ.Σ.Σ. ”Ο ΚΕΡΑΥΝΟΣ” Company description: “Our establishment’s main goal is to promote sports via renting our sports facilities to individual amateur or professional players for multiple kinds of sports including Football, Basketball, Futsal, Tennis, Padel etc. Our revenues are from rent, advertising, revenues from participating in European tournaments, ticket sales …