I work on the urgent challenge of creating a more sustainable society using a combination of novel technology and social involvement. I invite people to participate in environmentally and socially relevant projects to learn about sustainable solutions and adapt their behavior. In parallel, I design novel technologies that support these activities. I introduced low-power computing techniques to exploit the unused computing power of home PCs to run large-scale climate simulations, requiring much less energy than data centers. In the NoiseTube project, users of cellphones collectively measure and create detailed maps of environmental pollution, particularly of urban noise. In P2P Food Lab, I am currently working on small robots to help agroecological micro-farms with advanced crop monitoring and with physically challenging tasks.