Scientific American has a great article on why airships will probably not be part of our transportation infrastructure[0]. In short the energy required to move a specified payload is about the same as that of an airplane, but the payload gets there at a much reduced speed.<p>[0]<a href="https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20150701151003&#x2F;http:&#x2F;&#x2F;blogs.scientificamerican.com&#x2F;guest-blog&#x2F;helium-hokum-why-airships-will-never-be-part-of-our-transportation-infrastructure" rel="nofollow">https:&#x2F;&#x2F;web.archive.org&#x2F;web&#x2F;20150701151003&#x2F;http:&#x2F;&#x2F;blogs.scie...</a>