Despite recent attempts to paint the United States as a major global polluter, according to the World Health Organization (WHO), the U.S. is among the cleanest nations on the planet.
http://www.breitbart.com/big-govern...-among-least-polluting-nations-on-the-planet/
I'm far from an expert on the scientific issues involved, and even I can see some gaping holes in this article (it's from Breitbart, so go figure).
First of all, in declaring the U.S. one of the least polluting nations, the article is clearly intended as a salvo in the current climate change debates. But as the author himself makes clear, the WHO pollution data he cites does not include carbon dioxide emissions, the main contributor to global warming.
Then, when he finally does get around to mentioning CO2, he describes it as "colorless, odorless and completely non-toxic." This will come as news to anyone who has ever tried to hold a plastic bag over their head for more than a few seconds.
He then points out that growers pump CO2 into greenhouses to produce "stronger, greener, healthier plants"--as if that somehow makes it beneficial for humans.
He further says the atmospheric concentration of carbon dioxide has been much higher in earlier eras than it is now. Even if that's true, he doesn't specify which eras, or whether human beings even existed (or could have survived at all) back then.
Finally, he quotes a supposed climate scientist on the benefits of rising CO2, but without giving any specific explanation for that claim. That same "expert" further maintains that "the costs of warming are uncertain," whereas in fact climate change scientists have predicted some of the most dire long-term consequences with a significant degree of confidence and unanimity.
As I said, those are my layman's objections. Someone who's actually well-versed in the subject is welcome to add a critique of their own.