This world is dying... but there are others.
Upon reflection I have decided not only to eschew The Window, but to go with more Fate than ever before, in the form of Aspects-Only Fate. No skills. No stunts. Just a few Aspects. When you roll you get a +1 per Aspect that fits the situation, and you can still use them to Invoke/Compel normally.
The set-up:
People say the world is dying, but it really isn't. Earth is still there, 93 million miles away from the sun. It'll be there long after we're gone. Life will recover from what we've done, either in a few thousand years when the climate regulates itself, or now, if animals adapt to the super-storms.
Hell, humanity isn't even wiped out. Technically we can continue on indefinitely, down here, in our bunkers. We have food from our hydroponics. We have families. People are still having kids. We just can't go topside very often.
And hey, even the United States is still around. There's a flag over the Director's desk, and when the weather permits, we can communicate via satellite to other Americans in other bunkers. And we're all working together to solve the problem of this dying husk.
Some of the others, I'm told, are working on projects to fix the planet. I know for a fact that my brother's in a bunker trying to work out FTL so they can build some kind of space-arc to evac the survivors to some distant star.
Our project is a little more out there.
I don't know how it works, and I helped build it. Well, I was a technician working on the computer that programmed the computer that designed it. The second computer, (I call him Charlie) can't really explain to us how it works... the words it needs don't exist in English or any other language... but it has something to do with multiple world theory and quantum probability.
HOW it works is easier. You step on the platform, the machine turns on, and then you're somewhere else. In another universe. Because, Charlie says, it's more likely that you're there instead of here.
Okay.
The problem we're working on now is getting it to stick. See, anything you send to another world, after a short time... eight to fourteen months... it snaps back to our world. And anything you bring back with you eventually snaps back to its world of origin, unless it was like a sandwich and you ate it or something.
So we can visit other worlds. We can look around. We can bring stuff back to study it. But until we develop a means to stabilize the quantum charge, there's no way to actually evacuate the populace. And the teams we send to scout out other realities? No way to bring them back early or even communicate until they snap back normally.
Once they go, they're on their own.
But that's where we're at. Sending people blind into unknown parallel universes to try and find a new home for us, so that when we do perfect the technology, we can leave this rock and find a new home. Hopefully one we won't screw up so bad this time.