"Chikyū o Mitsumete" is a science fiction anime series that explores themes of environmentalism, human resilience, and the consequences of technological advancement. The story is set in a near-future Earth where environmental degradation has reached a critical point, leading to widespread ecological collapse. Governments and corporations have turned to space colonization as a solution, establishing colonies on the Moon and Mars. However, the focus on off-world development has further neglected Earth's deteriorating conditions, leaving its remaining inhabitants to face severe challenges.

The protagonist, Akira Tachibana, is a young engineer working for a space agency tasked with monitoring Earth's environmental data from orbit. Akira's role involves analyzing satellite imagery and relaying critical information to ground teams. Despite his technical expertise, he becomes increasingly disillusioned with humanity's reliance on space colonization as a means of escaping Earth's problems. His perspective shifts when he encounters a group of activists known as the Terra Guardians, who advocate for restoring Earth's ecosystems rather than abandoning the planet.

The Terra Guardians, led by the charismatic environmental scientist Dr. Hoshino, believe that Earth can still be saved through innovative ecological restoration projects. Akira is drawn to their mission and begins collaborating with them, using his technical skills to develop sustainable solutions. However, their efforts are met with resistance from powerful corporations and governments invested in space colonization, creating a tense conflict between those who seek to preserve Earth and those who prioritize off-world expansion.

As the series progresses, Akira and the Terra Guardians face numerous challenges, including corporate sabotage, political intrigue, and the ethical dilemmas of prioritizing Earth over space colonies. The narrative delves into the complexities of balancing technological progress with environmental stewardship, highlighting the interconnectedness of humanity's future with the health of the planet. Supporting characters, such as Akira's childhood friend and fellow engineer, Yumi, and the pragmatic corporate executive, Mr. Kuroda, provide additional layers to the story, representing differing perspectives on the crisis.

The climax of the series revolves around a critical mission to deploy a groundbreaking terraforming device designed to reverse some of Earth's environmental damage. The success of this mission hinges on Akira's ingenuity and the collective efforts of the Terra Guardians, but it also forces them to confront the moral implications of their actions. The resolution underscores the importance of unity and responsibility in addressing global challenges, leaving viewers with a thought-provoking exploration of humanity's relationship with its home planet.