Specialized Newspapers (Automobile, Sustainable, Nautical, Local)
News Condensator, News Forum
By jumping from link to link we can see that all the articles are connected through a huge copy-paste process and we can easily track down the origin of these headlines outbreak. In this connection network each link is materialized when the source is clearly stated in the article.
All the articles from the group of source 1 refers to a scientific survey from NOAA/University of Colorado Boulder. We can easily identify here the article responsible for most of the duplicates