English: Overview of the key space sustainability issues being considered in the 2020s decade. In the upper left corner, an axonometric view displays various Earth orbits, illustrating space debris and active satellites. The diagram includes a separate sheet for each orbit type, detailing the height, typical speed of objects, the number of active satellites, and essential sustainable practices for damage prevention and mitigation. To the right, a diagram displays Low Earth Orbit's debris density, and notable active satellites by height. At the bottom, the graphic enumerates crucial points for the sustainable utilization of space across diverse celestial bodies, such as Earth, the Moon, Mars, the asteroid belt, and other sensitive celestial bodies within our solar system.