Satellite images can be used to estimate how much carbon forests store as aboveground biomass (AGB) and how biomass varies in different forests. In a study published in the journal Nature, a team of researchers affiliated with the Smithsonian Tropical Research Institute (STRI), the University of Maryland, NASA and the Universidade Federal dos Vales do Jequitinhonha e Mucuri, Brazil, analyzed 16 million 2020 NASA-GEDI satellite estimates of biomass from forests in the Amazon, the Congo Basin and Southeast Asia.