Will a regularly operated lighter than air passenger line open before 2030?

Will more than 100 new passenger lighter than air airships enter service before 2050?

Will lighter than air airships transport >1M passengers total before 2040?

Will lighter than air airships transport >1M passengers total before 2050?

Will lighter than air airships transport >1M passengers total before 2035?

Will more than 100 new large lighter than air airships enter service before 2050?

Will more than 50 new large lighter than air airships enter service before 2030?

Will lighter than air airships transport >1M passengers total before 2045?

Will an airship capable of lifting 100,000+ kg exist in 2035?

Will the majority of new passenger aircraft sold in 2050 be hydrogen fueled?