Perchlorate is widespread in U.S. Southwest June 6, 2007 http://pubs.acs.org/subscribe/journals/esthag-w/2007/june/science/nl_perchlorate.html
軍や肥料由来のものと同程度の自然由来の過塩素酸塩が米国南西部の土壌に広く検出されることが報告された。
Balaji Rao et al.
Widespread Natural Perchlorate in Unsaturated Zones of the Southwest United States
Environ. Sci. Technol.; 2007; ASAP Web Release Date: 06-Jun-2007;
(Article) DOI: 10.1021/es062853i
