Climate disruption and increased human activity have a direct impact on ecosystems and populations. It is essential to have the means to observe, monitor and predict these events. Nanosatellite constellations are today the only way to have near real-time access to information at any time, anywhere in the world. The field of application that Prométhée offers is practically unlimited, from maritime surveillance, critical infrastructures, including the protection of ecosystems, water resources, fauna and flora, the fight against deforestation, illegal fishing or even prevention of natural disasters.