Boston prepares to go dark for Earth Hour 2009

On March 28, in observance of Earth Hour, the lights on the Citgo Sign, Prudential Tower, Zakim Bridge, and other famous Boston landmarks will go dark for one hour.

The Globe has this slide show with pictures showing how cities around the world observed the event last year. Check it out, and be sure to join the city and turn your own lights off at 8:30 p.m. on the 28th.