With the climate talks in Paris now over, the world has set itself a serious goal: limit temperature rise to 1.5C. Or failing that, 2C. Hitting those targets is absolutely necessary: even the one-degree rise that we’ve already seen is wreaking havoc on everything from ice caps to ocean chemistry. But meeting it won’t be easy, given that we’re currently on track for between 4C and 5C. Our only hope is to decisively pick up the pace. World leaders hail Paris climate deal as ‘major leap for mankind’ Read more In fact, pace is now the key word for climate. Not where we’re going, but how fast we’re going there. Pace – velocity, speed, rate, momentum, tempo. That’s what matters from here on in. We know where we’re going now; no one can doubt that the fossil fuel age has finally begun to wane, and that the sun is now shining on, well, solar. But the question, the only important question, is: how fast.