James Lovelock on world population

I recently posted an article by “Mish” Shedlock on population overshoot and Peak Oill

In conversation the predictions of James Lovelock, dating from 2008, came up, so I am posting part of a BBC interview here

James Lovelock - Population Reduction "max 1 billion"

Top scientist James Lovelock discuses that the world population will be reduced and that this will happen in this century. And states, we would need a miracle to stop that happening!

His body language suggest to me that he knows something with certainty.