The interaction of human alterations to the Mississippi River system with dynamical modes of climate variability has elevated the current flood hazard to levels that are unprecedented within the past five centuries. User Uhillbilly, in the Kossacks for Sanders: a site for Bernie Sanders supporters "after" March 15 subreddit, 08 Apr 2018
The interaction of human alterations to the Mississippi River system with dynamical modes of climate variability has elevated the current flood hazard to levels that are unprecedented within the past five centuries. User TheRichardPaul, in the Reddit Science subreddit, 08 Apr 2018