How Airbel Lab creates cost-effective impact

Which interventions work best, and how can we tweak them to work better? How well could they work in other places, and what changes should we make? Airbel Impact Lab, part of the International Rescue Committee, designs, tests, and scales life-changing solutions for people affected by conflict and disaster. Tim Phillips talks to Jeannie Annan and Caitlin Tulloch about their work.