Bagan

If the non-fiction section of your local bookshop is anything to go by, you should definitely start worrying about the end of human civilization. Publishers are churning out studies in cultural pessimism like cookbooks nowadays.

One of my favourites in this genre is The world without us, a popular science title in which journalist Alan Weisman imagines Earth sans homo sapiens. Gathering evidence from places that are already devoid of human interference, like the Korean DMZ or Chernobyl, Weisman reveals that the rest of the planet would get over mankind pretty quickly.