"Ellesmere Island, Nunavut — It’s August, and there’s snow on the ground. The six-week summer has already passed; our 24-hour daylight will drop to 16 in just a month’s time. Small, brittle leaves crunch underfoot as I walk across tundra that’s already beginning to freeze for the long winter ahead. The top of the world is a cold place. I’ve been at a field camp here in the Canadian high Arctic gathering climate change data from one of the most remote and isolated regions of the planet. It is barren, wild and beautiful. Yet this place is not beyond the reach of our carbon emissions."