Outer space has long been considered the last untouched wilderness. Though space law was formed during the State-centric Cold War. However, as non-State actors increasingly infiltrate space, the risks of space pollution is growing. This book examines space law, including the Outer Space Treaty, along with international environmental law, international criminal law, international humanitarian law, international human rights law. It evaluates three prospective approaches to space law concerning non-State actor pollution and surveys States' domestic approaches. In parallel, the book examines the deeper implications of the seismic increase in NSA activity in the traditionally State-centric domain of space exploration and exploitation.