It's a chicken-and-egg riddle: Is energy efficiency driving energy use, or reducing consumption that would happen anyway?
Opinion: There's growing risk of the oil sands becoming stranded assets. Do federal finance officials have a Plan B?
There's plenty of evidence now that carbon pricing, when properly im­plemented, doesn’t kill economies. Ontario is listening.
COMMENT: Israeli biogas startup HomeBioGas not only wants to close the loop on food waste, it wants to shrink it.
OPINION: Assuming no black swans rewrite the script for 2015, the year ahead gives us reason to be hopeful on many fronts.