#introduction I’m an atmospheric scientist interested in understanding concentration patterns and exposures at the hyper-local scale (<1 km), mostly in urban areas. We get at this with #mobile sampling and #low-cost sensors. A founding member of @AfriqAir, I’m working with @subu_caps, @dwestervelt, @vfmcneill and others to build air quality capacity in the Global South. Also interested in how to grow bigger #dahlias.