CBC: If climate change is weighing on your mind this holiday season, especially after the signing of the Paris agreement, you're not alone. There's an image that's been slowly circulating on the internet. It's of an older, bearded man, his smile tentative, his eyebrows furrowed. The caption reads, "When ur enjoying the warm weather in December, but deep down u know it's because of global warming." It's been shared thousands of times, incorrect spelling notwithstanding. And it taps into a lot of talk...