{"id":122723,"date":"2019-06-13T22:50:24","date_gmt":"2019-06-13T22:50:24","guid":{"rendered":"https:\/\/www.bnreport.com\/some-canadian-lakes-still-store-ddt-in-their-mud\/"},"modified":"2019-06-13T22:50:24","modified_gmt":"2019-06-13T22:50:24","slug":"some-canadian-lakes-still-store-ddt-in-their-mud","status":"publish","type":"post","link":"https:\/\/www.bnreport.com\/en\/some-canadian-lakes-still-store-ddt-in-their-mud\/","title":{"rendered":"Some Canadian lakes still store DDT in their mud"},"content":{"rendered":"

Five decades after DDT was last sprayed across Canadian forests, this harmful pesticide can still be found at the bottom of several lakes.<\/p>\n

Researchers analyzed sediment from five lakes in New Brunswick, Canada, where airplanes spewed DDT to combat spruce budworm outbreaks before the insecticide was phased out circa 1970. Millions of kilograms of DDT were sprayed across the province, making it one of the most heavily treated forest areas in North America. Today, elevated concentrations of DDT and its chemical by-products persist<\/a> in lake sediments in this region, researchers report online June 12 in Environmental Science & Technology.<\/p>\n

\u201cThis is a cautionary tale,\u201d says study coauthor Joshua Kurek, an environmental scientist at Mount Allison University in Sackville, New Brunswick. \u201cWhen we ban a substance, we tend to forget about it.\u201d But these results indicate that decades-old pesticide sprays may have left a lasting impression on hundreds to thousands of lakes in eastern North America.<\/p>\n

Kurek and colleagues measured concentrations of DDT, as well as its toxic breakdown products DDE and DDD, in lake sediments dating back several decades. Most modern sediments from all five lakes exceeded the safety thresholds for aquatic life for DDT, DDE and DDD set by the Canadian government: 4.7, 6.7 and 8.5 micrograms per kilogram, respectively.<\/p>\n

The only lake that contained safe DDT leveRead More \u2013 Source<\/strong><\/a>
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science news<\/a><\/h5>\n

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Five decades after DDT was last sprayed across Canadian forests, this harmful pesticide can still be..<\/p>\n","protected":false},"author":1,"featured_media":122724,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-122723","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-science"],"yoast_head":"\nSome Canadian lakes still store DDT in their mud - Business News Report<\/title>\n<meta name=\"description\" content=\"Five decades after DDT was last sprayed across Canadian forests, this harmful pesticide can still be..\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.bnreport.com\/en\/some-canadian-lakes-still-store-ddt-in-their-mud\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Some Canadian lakes still store DDT in their mud - 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