Why?
Well, most liberals live in our largest cities. And since everything that happens on this planet is America's fault, global warming (if it exists) is our fault too.
Turns out, that it is now believed that it is the urban centers that are causing global warming (if it exists).
"Cities use vast amounts of resources like water, food and timber while also producing a large amount of waste," said Klaus Toepfer, head of the United Nations Environment Program, or UNEP.So, liberals, thanks for trashing the planet.
"People living in San Francisco or London may look at these images of deforestation or melting Arctic ice, and wonder what it has to do with them," Toepfer said. "Their impacts stretch beyond their physical borders affecting countries, regions and the planet as a whole."