Ever since the first signs of liquid water were discovered on Mars a few years ago, we have been asking ourselves whether it is possible to resettle humanity on the red planet. But what about the future of our planet? With a water volume of 1.386 billion km3, a distance of 149,600,000 km from the sun, and an average temperature of around 15°C, the blue planet still offers our best chances of survival. This is where we should direct our efforts first.