Vision 2030 is meant to reorient the kingdom’s economy away from fossil fuels and toward innovation and technology. But the vast scale and cost of the project, which reports say could spiral to more than a trillion dollars, is posing difficulties even for Saudi Arabia, despite its reserves of oil wealth. At a recent exhibition in Hong Kong, Saudi Arabia showcased its futuristic vision for its planned Neom megacity. Among the exhibits were designs for The Line, a sprawling residential structure consisting of two skyscrapers that were originally intended to house nine million people. Is the future of fossil fuels at stake ?