The mayors of Taylorsville, West Valley City and Provo, above, speak with students from Mountain View Elementary School in Salt Lake City during the Utah Clean Cities kick-off event for the 2011 Idle-Free Month on Sept. 1. Idle-Free month encourages motorists to reduce idling time by turning the car off when not in use. Right, Tim Porter, vice principal of Mountain View Elementary School, high-fives students while another student displays the emblem on the back of a safety vest. Below right, Salt Lake County Mayor Peter Corroon was among the luminaries who addressed the students. Far right, third-graders Juan Ruiz, center, and Carmen Rodriguez clap during an "idle-free" rap performed during the kick-off event.