My work focuses on how ecosystem-climate feedback loops emerge (in deep time) and are maintained (in the present). Using a combination of modelling, satellite and fieldwork data, I study how the climate is shaped by (and shapes) interactions between ecosystem engineers, and how organisms acting selfishly emergently form persistent biosphere-scale feedback systems. Presently, I am investigating these questions by using climate models to determine whether aerosol production by trees and fungi in the Amazon can together exert biotic control on cloud formation and precipitation.