Online Network Maps of 'Act On CO2' Google SERP

These images are maps of the online link networks between the 20 top ranking sites in Google for the search query "act on co2" on June 16th 2007. The heavy cluster of .gov sites in the middle shows large nos of UK government websites dominating the search engine results. This dense cluster of nodes shows the effectivness of linking between sites on established domains which are trusted, have great link equity and are regularly updated with unique content.

I want to analyse these further at some point, looking at who's "occupying the Act On CO2 space" on the major social networking sites including Digg, YouTube, delicious and many more...