As Principal Investigator on two informal-science learning projects, David leads a team of interdisciplinary professionals who are all dedicated to engaging communities with climate science. Cool Science displays K-12 student artwork about climate change throughout the local transit authority in Lowell, Mass. ScienceToGo.org is a multi-faceted learning campaign on the Boston subway featuring “Ozzie the Ostrich,” who engaged Bostonians with the reality, relevance and hope associated with climate change. Both projects utilize out-of-home media and social networks to engage the riding public with science-learning opportunities during their daily routines.