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.
Articles from the group of source 2 are connected to an article from the New Scientist. This article is missing so there is no observable connection to any kind of scientific survey.