FILE PHOTO: A copper roll that will be used for drawings is seen at the workshop of the artist Ricardo Moreno in San Pedro de Barva, Costa Rica October 23, 2017. REUTERS/Juan Carlos Ulate/File Photo
FILE PHOTO: A copper roll that will be used for drawings is seen at the workshop of the artist Ricardo Moreno in San Pedro de Barva, Costa Rica October 23, 2017. REUTERS/Juan Carlos Ulate/File Photo