And red doesn't mean you cannot live there, but it means that it's becoming decreasingly suitable for human life, whereas green means that relative to how it used to be, it's becoming more suitable for human life.
Y lo rojo no significa que no es habitable, sino que está volviendo cada vez menos idóneo para la vida humana, mientras lo verde significa que comparado a como era antes, está volviendo más idóneo para la vida humana.