His current research projects include: (1) Public discourse on climate change in social media and newspapers (sponsored by NSF); (2) People as sensors: flood monitoring through Twitter communication data mining; (3) Communication on mega-sports events in social networks; and (4) Climate change, land use change, and agriculture on the Northern Great Plains (sponsored by NSF). He also serves as a coordinating leading author on climate change in the United Nations Environmental Program Global Environmental Outlook assessment.