With climate change accelerating, some scientists propose not just mitigating damage, but actively repairing Earth’s ecosystems through geoengineering and synthetic biology. Ideas include seeding oceans to absorb carbon, genetically engineering plants to thrive in harsher climates, or even creating artificial glaciers.

While promising, these interventions carry massive risks — unintended side effects, ethical dilemmas, and governance challenges. Should humanity “play God” with the planet’s systems? And who gets to decide what a “healthy” Earth looks like?

Terraforming Earth could be the boldest project in history, requiring global cooperation and humility. Whether it succeeds or fails will shape the future of life on this planet.