Press Association: A Danish warship today confronted a Greenpeace ship which is on a mission to target “dangerous” deep sea oil drilling sites, the environmental group claimed. The incident happened in the freezing seas off Greenland as the protest ship Esperanza approached one of the world’s most controversial oil drilling projects operated by the British company Cairn Energy, said Greenpeace. The Greenpeace ship left London 12 days ago vowing to challenge the oil industry at the site of a …