What is the role of a $25 billion humanitarian aid industry in a trillion dollar problem? The size of the challenge is well beyond the humanitarian system.

So what kind of rethink is necessary for the way aid agencies work in the face of this impending threat?

To answer that question, TNH Director Heba Aly is joined by Paul Knox Clarke, the former head of research at the humanitarian network ALNAP who is now heading up the Complex Humanitarian Crises initiative, and Donna Lagdameo, the senior policy adviser and Asia Pacific focal point for the Red Cross Red Crescent Climate Centre.