Still, in every analysis of live music’s environmental costs, the largest contributor is fan travel. In 2007 Radiohead teamed up with a consultant organization called Best Foot Forward to produce a report on the environmental costs of two of its tours. The researchers analyzed the carbon footprint of the band’s mileage, merchandise and catering, and fan travel. They concluded that Radiohead’s 2003 amphitheater run generated 10,000 tons of carbon, while its 2006 theater circuit generated about 2,500. In both cases, the artists had roughly the same impact: 330 tons of carbon, primarily from their own transit. But the 12-stop amphitheater tour, which played to 240,000 fans, had significantly higher emissions than the 19-stop theater tour, which only played to 70,000 fans. While each ticket holder’s carbon footprint may have been small, all those car rides quickly added up.