The environmental movement often talks about restoring ecosystems. But restoring them to what? If there were no people here, it seems unlikely that North America could revert back to an era with ground sloths the size of SUVs and elephants the size of collie-dogs.
Alan Weisman is a senior producer for Homelands Productions and author of the book “The World Without Us.” In it, he takes the reader on a global tour of what would happen if people were suddenly to vanish. Alan Weisman explained his motivation for the project.
This interview aired earlier this year.