The document discusses 10 ways that APIs can be used to change the world. It suggests using APIs to help make the world more generous by powering philanthropic services, to advance scientific research by providing APIs for scientific publications and data, to make great content more widely available by allowing remixing and reusing of content, and to put energy and environmental data as well as government and human knowledge data in the hands of developers to build useful applications. Overall it argues that APIs can be used to create new resources and empower people by opening up access to important data.