Bryce Canyon National Park, Utah. 布萊斯峽谷國家公園，猶他州。

Ethan Miller / Getty Images

Ethan Miller / Getty Images
PhotoBlog - EPA orders Utah to cut haze across national parks http://photoblog.msnbc.msn.com/_news/2012/05/03/11521282-epa-orders-utah-to-cut-haze-across-national-parks?lite