Life After People is a television documentary series where scientists and other experts speculate about what the Earth might be like if humanity no longer existed, as well as the impact humanity's disappearance might have on the environment and the artificial aspects of civilization. The program premiered as a two hour special on January 21, 2008 on the History Channel. which served as a de facto pilot for the series that premiered April 21, 2009.
The program does not speculate on how humanity disappeared, only that it did so, and suddenly, leaving everything behind including household pets that have to fend for themselves. The rest of the speculation is based upon documented results of the sudden removal of humans from a geographical area and the possible results that would occur if humanity discontinues its maintenance of buildings and urban infrastructure.
The following are the first part of it.
I will post the rest later.