My research revolves around how to harness the collective intelligence of human crowds to address complex issues around social and environmental sustainability like climate change, overfishing, urbanization, and most recently COVID-19. While no individual has the right answer to these so called wicked problems, I am trying to explore ways to crowdsource laypeople's informal knowledge  and day-to-day intelligence to get to the right answer, especially where knowledge developed by professional science lacks. To address this, I draw on social, behavioral, and cognitive theories, develop computational models, and use data science techniques.