As many a teenage girl knows, the world that Suzanne Collins paints in The Hunger Games is a different, grim place. America in particular has become a spoiled strife-land due to war, fires, droughts and presumably other Biblical-level disasters. Perhaps most dramatically, the nature of the landscape has completely changed, with huge rises in sea levels taking great chunks out of entire continents.
Anybody who wants to know what that ocean-dominated planet would look like now can, thanks to a nifty simulator that depicts major increases (and decreases) in ocean heights. The "Speculative Sea Level Explorer" is the work of London programmer Benedikt Groß, who created it to see how climate change might alter the coast of the English county of Lincolnshire. Groß had such a blast with the project that he decided to expand its scope, as he writes here (note: I edited this for clarity):