"People do have a right to be housed but not in the very expensive areas, " he explained.

BBC: Social housing: 'No right' to live in expensive areas

It's not that easy to say for sure, but the Item Club economists suggest it might be explained by sectoral changes in employment.

BBC: Stands Scotland's economy where it did?

He explained that it was not possible to determine the cause, but that the changes could be linked to the environment - more specifically to pollutants that have built up in the Arctic, and in the polar bears' bodies.

BBC: 'Stress' is shrinking polar bears

He explained that his programme would not be able to stop people making cruel comments, but it could help them learn how to deal with them.

BBC: Last Updated: Friday, 7 March 2008, 12:31 GMT