DIA turning off prominent lights for Earth Hour

For the third year in a row, Denver International Airport is turning off several prominent lights for Earth Hour, including the infamous statue titled "Mustang," a blue horse with blazing red fiery eyes at the entrance to the airport. It's part of a campaign by environmentalists to highlight the threat of climate change.

The airport will first turn the LED sign along eastbound Pena Boulevard green, from 7:30 p.m. to 8:30 p.m., in a symbolic expression of Denver's efforts to work toward a greener city and planet. The other lights will be turned off from 8:30 p.m. to 9:30 p.m. in celebration of the worldwide event.