R Subramanian is a Senior Scientist at the Environment and Sustainability Center (ESC) of the Qatar Environment & Energy Research Institute (QEERI), where he leads QEERI’s research on sensors for air quality and climate. He is also a research fellow at the Kigali Collaborative Research Centre (Kigali, Rwanda), a visiting researcher at OSU-Efluve/CNRS (Creteil, France), and an adjunct faculty member in the Department of Mechanical Engineering at Carnegie Mellon University (Pittsburgh, PA, USA).