Lily#12

In the far future the Earth was no longer habitable, so humans had to temporarily left the planet. Centuries later, humans found that the planet's soil is able to grow plants again, so they send a robot to revive the ecosystem. However as it landed, it found that things on this planet are different from before: changed climate, novel minerals, deadly toxins, and worst of all, alien colonizers. Despite all that, the robot had to overcome all the obstacles and finish its mission by utilizing everything it got.