What is combustion? What happens when wood burns? Learn about the chemistry of combustion in this animated explainer. This Science Spotlight video is part of our Engineering Is: Saving the World with Cookstoves e-book, and is a companion to our Darfur Stoves Project video. The e-book tells the story of how Professor Ashok Gadgil and his team at Lawrence Berkeley National Laboratory designed a cookstove to help internally displaced persons in Darfur. They are now working on designing a new wood-burning stove to reduce indoor air pollution. The e-book includes videos, interactives and media making opportunities that explore the science and engineering principles behind this project.