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©Chris Stowers/Panos Pictures..PHILIPPINES Banaue Town, North Luzon  2003..Rice farmer Samuel Talango holds up  one of the giant earthworms that infest his paddy fields. These worms are eroding the delicate system of terraced rice fields, their burrows weakening the dykes and walls.  It is thought that they were accidentally imported to this region via a new breed of pig, from Mainland China.