Life Without People was a History Channel production similar to the book The World Without Us, both of which discussed the idea of what earth would be like if people magically (or tragically) disappeared.  The encouraging thing is that plants and animals would likely take over relatively quickly, most of which would happen without even a second thought as to where all the humans went.  At least we didn't screw things up so bad that they can't be undone.  The interesting thing is that most, if not all, man-made "things" (buildings, bridges, cars, houses, books, computers, etc.) will likely pass away after a while (maybe a few thousand years) without even a shred of evidence that they ever existed in the first place. #science