Is the Arctic too far gone?

On the eve of the northern hemisphere summer solstice last month, a Siberian town inside the Arctic circle, cracked 38 degrees Celsius for the first time. It’s a point scientists didn't think we’d reach so soon, but here we are. The current Arctic heatwave is not just a product of climate change. It’s also an accelerant for it. So has the warming in the Arctic passed a point of no return? Featured: Profession Will Steffen, Climate Council of Australia