[quote=@DarkwolfX37]
<Snipped quote by LegendBegins>

Yes, which requires solar system testing, aka space. 
That's highly theoretical, unless the theories have changed, most astronomers, ya know, people who study space like we're talking about, would say that's not the case, and antimatter near the planet would be very easily disastrous. 
We. Are. Running. Out. Of. Planet. I don't know how you expect to get past that without space investment barring religious answers. 
[/quote]

When we get to that point. We're nowhere close.
Antimatter is decently understood at this point. It's simply particles on opposite paths and the like; you can look it up.
The fact is that we have quite a bit of time before the planet is uninhabitable. Several hundred years at least, with new advances in renewable resources. However, I believe humanity (sans rapture) will easily destroy itself within a hundred years.
If you're referring to overpopulation, it isn't particular a major ordeal at this point; we simply need to expedite food production, which can easily be done. There is a long way to go before Earth is unsustainable.