Supporters of soft-drink taxes haven't succeeded on the national stage, but a state-by-state approach seems to be working. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Dan Gates, with Albuquerque's Air Quality Division, measures pollen in the air. Despite a 1994 city ban on trees like mulberry, elm and cottonwood, residents have to wait decades for existing trees to die before pollen levels likely will go down. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

This painting depicts the last days of the Pony Express as telegraph lines were being raised out West. The Express ran for approximately 19 months and was formally discontinued on Oct. 26, 1861. Courtesy Pony Express National Museum hide caption

itoggle caption Courtesy Pony Express National Museum

Troy Dalton of Colorado Springs Utilities disconnects a streetlight. The city estimates it will save over $1.2 million a year by turning off a third of the lights, but it's not enough to cover a $28 million budget gap for 2010. Jeff Brady/NPR hide caption

itoggle caption Jeff Brady/NPR

A snowboarder catches air at a resort in Maine. A recent Dartmouth report reveals that resorts report an average of 23 percent more snow on weekends than during the week. Robert F. Bukaty/AP hide caption

itoggle caption Robert F. Bukaty/AP