Bermuda Trianglization of Society. Maybe we can disappear as species and not leave a trace. Now there is a black swan.

We will leave plenty of traces: a mass extinction episode, toxic & radioactive waste dumps, a depleted stratospheric ozone stratum, an atmosphere replete with oxidized carbon & other high heat capacity gasses, and an acidified ocean, to name but a few of the major "traces" we will leave behind.