structural:reformatting, information:classification
Efficiency

The main advantage of airships with respect to any other vehicle is that they require less energy to remain in flight, compared to other air vehicles. The proposed Varialift airship, powered by a mixture of solar-powered engines and conventional jet engines, would use only an estimated 8 percent of the fuel required by jet aircraft. Furthermore, utilizing the jet stream could allow for a faster and more energy-efficient cargo transport alternative to maritime shipping. This is one of the reasons why China has embraced their use recently.