NASA estimates that Cometary Resources could support a population if 10 quadrillion people and a single 2km Near Earth Object would be the equivalent of 30,000

NASA estimates that Cometary Resources could support a population if 10 quadrillion people and a single 2km Near Earth Object would be the equivalent of 30,000 total Earth GDPs to launch* It is a new frontier, vast on a scale that dwarfs everything we are now. What is the population density required for a cometary level civilisation to develop interstellar technology ? * http://nix.nasa.gov/search.jsp?R=20050092385&qs=N%3D4294966819%2B4294583411 http://nix.nasa.gov/search.jsp?R=20050092385&qs=N%3D42949668...