Alarm bells sound over oil spilldispersantuse

http://www.bangkokpost.com/learning/learning-from-news/362349/oil-spill-clean-up-chemicals-what-are-they

Oil slick: Bigger than it looks (Updated)

 http://www.bangkokpost.com/learning/learning-from-news/362556/oil-slick-bigger-than-it-looks-updated