2015.04.29 It could take 30 years to undo the pollution damage to MN waters, report says Posted on May 24, 2015May 24, 2015 by admin While the article is about Minnesota, clearly states that phosphorus is to “blame” for algae, caused by farming runoff. http://bringmethenews.com/2015/04/29/it-could-take-30-years-to-start-undoing-pollution-damage-to-mn-waters-report-says/?cid=etemail