Pollution, quite literally, stinks. And as ominous images from around the world show, it is a problem that spans from China, India and Paris to California, New York and everywhere in between. Whether from vehicle emissions, coal plants, agricultural operations, forest fires, or other sources, pollutants take a toll - on the Earth, of course, but also on its inhabitants. Recent studies have linked pollution exposure to asthma, autism, heart disease, cancer, schizophrenia, migraines, and more.

In an effort to address such health problems, the U.S. Environmental Protection Agency announced back in March new fuel and automobile standards that will cut gasoline sulfur levels by more than 60 percent, and reduce tailpipe and evaporative emissions from cars and trucks. The EPA hopes these moves will prevent up to 2,000 premature deaths a year, and 50,000 cases of respiratory ailments in children.

 Can you imagine this going on in Denver?