"Green Mars" is a term often used to describe the vision of a terraformed Mars, where the planet's environment is altered to support Earth-like life. This concept involves introducing plants, microorganisms, and water to create a sustainable ecosystem, potentially making it habitable for humans. The idea of transforming Mars into a green planet has been popularized in science fiction and scientific discussions. Techniques such as terraforming and the use of greenhouse gases to warm the atmosphere are proposed methods to achieve this goal, aiming to create a more hospitable environment for future exploration and colonization.