I found this article about airships for commercial travel delightful, not least for the nickname given to the Airlander 10.

This was an interesting section header -- "Between 80 and 90% fewer emissions" -- how about 100% fewer emissions? Anumá Aerospace airships, with solar panels, all-electric propulsion and lift systems along with our patent pending regenerative descent will have zero emissions. We think 100% is better.