At the NATO leaders summit this week, the defense alliance said it would begin formally studying how climate change impacts security threats, and how member states could make their military operations more resilient and less polluting. The alliance said climate change makes it harder for militaries to do their jobs. On The World’s weekly look at climate solutions, the Big Fix, we’ll also be looking at how understanding climate change can help build peace. Host Marco Werman is joined by Janani Vivekananda who heads the climate and security program at adelphi, a research institute in Germany.