Yesterday was July 4th, a day when Americans see many flying flags. But one that environmentally-unfriendly industrialists might not like to see is artist John Gerrard's "Western Flag:"

To be clear, Gerrard is neither American nor is "Western Flag" a critique of America. Rather, the Irish artist is making a statement about modern civilization. "One of the greatest legacies of the 20th century is not just population explosion or better living standards but vastly raised carbon dioxide levels in the atmosphere," Gerrard writes. "This flag gives this invisible gas, this international risk, an image, a way to represent itself."

In the following video he explains why the virtual flag was "sited" at a particular locale in Texas, and explains how it was created: