And a beautiful world we live in, when it is possible, and when many other such things are possible, and not only possible, but done-- done, see you!-- under that sky there, every day.
If we're going to prevent large parts of this Earth from becoming not only inhospitable but uninhabitable in our lifetimes, we're going to have to keep some fossil fuels in the ground rather than burn them and release more dangerous pollution into the sky.
You can't run forever. There's only so much pavement that the road makers lay down. After a while, the highway quits going north and it just turns into sky. And you can't go anywhere in the sky unless you have a plane or some kind of rocket.
We all live in our own world. But if you look up at the starry sky - you'll see that all the different worlds up there combine to form constellations, solar systems, galaxies.