A substance described as "white stuff" and "milky rain" is covering parts of Washington and Oregon states, but its origin is a mystery.
원문출처 : http://edition.cnn.com/2015/02/07/us/northwest-mystery-ash/index.html?eref=edition
원문출처 : http://edition.cnn.com/2015/02/07/us/northwest-mystery-ash/index.html?eref=edition