A world in which global crop yields fall by almost one-third, billions of people are left with insufficient water, and hundreds of millions in coastal cities are forced from their homes is not some dystopian fantasy. It is part of the stark reality facing our planet if do not collectively accelerate action on climate change. The good news as enter a new year is that there is not only an array of tools at our disposal to tackle this existential challenge, but also growing recognition of the urgency to do so.