1) The tourism industry is utterly dependent on oil, as over 90% of tourism's energy usage is for transporting tourists to and from destinations.
2) There is disagreement around when global oil production will reach its peak and begin declining, but geologists agree it will happen. Once peaked, cheap oil will be gone forever.
3) Future oil demand projections expect demand to grow significantly by 2025, but some experts argue this does not account for factors like potentially faster growth from countries like China and uncertainties around peak oil. Meeting sharply rising future demand represents a major challenge.