Starcraft Conquers the Planet Asra

In 8090 AD, the earth's resources have been exhausted, the sky has become dark, and vegetation and animals have slowly decreased and become extinct. In order to survive, the people on earth had to destroy all weapons of war and coexist peacefully. Scientists discovered that the thing that could restore the earth's ecology was unobtanium, a kind of super energy, but there was no such natural resource on the earth, so the people on earth began to explore the universe. Finally, they discovered a planet named Asra 10 light-years away that was rich in unobtanium...