Grasslands and savannas face continual pressure from agricultural conversion and livestock grazing since they occupy lands with high potential for food production. The prairies and savanna-forest transition zone on the Great Plains of North America have experienced these pressures for more than 100 years. Savannas in South America, such as the cerrado of Brazil, have faced rapid conversion to agriculture since 1980, whilst African savannas are home to tens of millions of people, and face uncertain future from population expansion, resource exploitation and climate change. This research seeks to examine the dynamics of global savannas and grasslands using multiscale remote sensing with sensors from multiple satellites and spanning spatial resolution from 1 km to 1 m pixels. Remote sensing can provide both indicators of change through time, and quantitative retrievals of specific chemical and physical properties of land cover components.