xkcd #3298: Aerospace Flowchart
Title text:
Someday, we will find the problem that goes with this solution.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3298/
No, it's actually kind of an idea that people have thought about. The upper atmosphere on Venus is a kind of OK environment and because of the thick atmosphere, it's even easier to float there than on earth. The trouble really starts when the acid clouds begin.