There are ten orders of magnitude between an individual and the estimated ±10 billion people projected to inhabit the planet by 2050. While some strategies to rapidly reduce carbon emissions can be deployed at the individual or household level or require international cooperation, most can be implemented at the community (village to large urban) scale. This session explores examples of scaling and associated challenges and opportunities for the up-scaling of a wide range of technological and social strategies to reduce greenhouse gas emissions and ideally concentrations. We invite abstracts from natural and social scientists, planners, policy and decision-makers and others engaged in deploying and scaling climate action strategies to reduce climate risks and increase societal and environmental resilience.