February 17th, 2073.
Everything was eerily calm. Aside from a few fiery crashed planes and the last of the human-powered trains derailing, the world was quiet. Too quiet, except for hungry dogs with full bladders barking inside suddenly empty houses.
Traffic lights changed from yellow to red, red to green, then yellow to red again. Clock towers struck 9:00 AM and the Times Square marquee scrolled unchanging stock market shares. Swing sets swung and flags unfurled in the breeze.
This wasn’t the post-apocalypse sci-fi anyone had read as a teenager.
People had simply vanished. Poof.
The dark green fog, Green Evanescence, had taken every human with it.