Responses

You know their technology is so advance that their train has air purifier built-in. If you know what's ISS is. They also have that in there. Cus in space theres no gravity. If someone fart. The fart would just float and wouldn't dissapate on air and they would all die from suffocation of carbon dioxide and nitrogen. So they have built-in purifier that would suck all bad air and and another one that gives oxygen.
That adult only train car has got to smell terrible.