White holes aren't proven yet. They are like the other end of black holes. Anyways, Black holes aren't proven too... we haven't observed them directly, yet. We observe black holes indirectly, in the present.Anyways, they are still theories.
For the humanity leaving the Earth, we have no choice really. Plus, I'm up for preserving the earth once we leave the planet.
And for the food and water thingy, honestly, it's true. Since human population keeps growing. The only thing that can really cure this is if we move into space and find a new livable habitat... plus the 3D printer will be a great help. But humans are so gratified by the "pleasure-now-work-later" and also most high ranking people plan for short term not long term coz they are like, "I honestly dont care. I wont be alive at that time, anyways."
@Kirsch-That sounds a nice idea. Anyway, you want me to do it, don't you? coz I'm the one who is always around here.
@Kenzi-In general, they are pretty understand. They are just 'holes' (or point in space if you eant) that swallow things up. But of course, there are many more about them. So yeah, there's complexity if you wanna study them more.