Climate change is a global environmental issue which will have increasingly undesirable effects around the world in our lifetimes. Air pollution is a local, regional and hemispheric issue that has adverse impacts on public health, agricultural yields and ecosystems. In many cases the emission of air pollutants and greenhouse gases (GHG) come from the same sources and addressing both together could have large co-benefits. However, policies to address the issues are currently separate. Integration of air quality and climate mitigation efforts will likely become a major issue in upcoming domestic legislative and policy debates. The topic is also important internationally as developing countries which face worsening air quality might be engaged in efforts to address climate change if technology and policy options were available that addressed both issues simultaneously. Black carbon (BC) is an aerosol (particulate) that is emitted in combustion processes. It has a positive radiative forcing and hence contributes to climate warming. Reductions in its emissions would provide a positive benefit to both human health and would help reduce climate warming. This workshop will examine ways in which BC emissions can be reduced domestically and internationally and whether and how such reductions should be placed within domestic or international air quality and/or climate agreements/legislation/ regulations.