quote:Vaughan said he believed that the emergence of two vast icebergs from the Ross Ice Shelf in so short a time should not be a cause for worry about global warming.
"Every now and again a big iceberg breaks off the ice shelf and that is absolutely nothing to worry about because they've always done that.
"That's the normal, natural cycle of the ice shelf. There are areas where we've seen ice shelves retreating over the last 50 years, and we think that is a response to climate change, but this is not one of those areas.