Telempath — Spider Robinson

NOT WITH A BANG OR A WHIMPER...
...but with a wail of outraged despair. That was how it ended.

For those infected with Carson's Syndrome virtually every artifact of technological society carries an odor that is utterly maddening. When the strange artificial plague arrived, all over the world people exploded from their cities and towns, killing anything and anyone that impeded their mad stampede for air untainted by technology.

When it was over not one in a hundred had survived. And that was only the beginning...