'Going Green' is an intercultural blended-learning project and the product of a partnership between the U.S. Embassy in Berlin, the University of Lüneburg, and LIFE e.V. In this project, German and U.S. students explore approaches to sustainable development collaboratively through an e-learning platform (Moodle). Participants navigate through web 2.0 applications and social media, and exchange their findings. They will publish their local initiatives online and contribute them to a concluding student conference. This paper will present exemplary task-cycles and address major pitfalls and best practice examples from participant courses. Hands-on task suggestions and useful web-applications relevant for other classroom topics and EFL settings will be presented.