Healing the planet: Global warming hero Bono only uses more than 100 fossil-fueled semis to cart his stage around; he's kept his video screen to only 14,000 square feet in size

U2's Saturday concert to be Twin Cities' biggest outdoor concert in decades - TwinCities.com

The more than 100 semis that cart the Claw from town to town began arriving Sunday, with workers enduring the week's heat and humidity to construct the largest stage ever created for a tour. U2's lead singer, Bono, and two veteran stage designers worked together on the concept for the four-legged, 170-foot steel monster.

The stage itself sits at the center of the Claw, while the steel arms hold speakers, lights and a 14,000-square-foot, 360-degree video screen.
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At the stadium, the crew's first step was to cover its artificial turf with a 2-inch-thick aluminum floor. In some venues, such as Busch Stadium in St. Louis, the tour paid to have the sod torn out and then replaced after the show. The construction of the Claw takes almost a week, plus several days to tear down, so there are actually three full Claw stages that have leapfrogged from venue to venue.