
It's 2060. Your grandchildren are sitting in their classroom. On the wall hangs a photograph of a blue planet. But it isn’t Earth. It’s a planet in a distant star system. And we know that this planet harbours life. Humanity is not alone. Now imagine a different scenario. Suppose our search for planets with alien life finds nothing. What if Earth is the only fertile oasis in the galaxy and there is nowhere else to go? Wouldn’t that make preserving our planet’s environment even more important?