Climate deal: the pistol has fired, so why aren’t we running? | Bill McKibben

There can be no complacency after the Paris talks. Hitting even the 1.5C target will need drastic, rapid action

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.

Related: World leaders hail Paris climate deal as 'major leap for mankind'