'It's like the earth is under attack by Martians, but we are the Martians.' says actress

Actress and environmental activist Emma Thompson, who has recently returned from a trip to the Arctic with Greenpeace, has been talking to the BBC's Andrew Marr.

'It's like the earth is under attack by Martians, but we are the Martians."

You can watch the Andrew Marr Show in full on the BBC iPlayer