Montreal Gazette: Candles? Check. Flashlight? Check. All set to celebrate Earth Hour? Great. While you’re sitting in the dark, let’s shine a light on how much of the planet’s resources you’ve been using up. At 8:30 Saturday night, some city streets will fade to black as thousands of Montrealers switch off the lights for 60 minutes to call attention to climate change. Darkness will envelop city hall, the revolving beam on Place Ville Marie will go out and even métro employees will dim …