As I mentioned in the other thread, the largest asteroids and comets in Sol System contain more fresh water than currently on Earth.
Whoa!!!! Unconfirmed made up factoid!!!! aka BS. I'll give you a million dollars if you can find a legitimate source that says that. Because you can't.
We have two options as a race:
A. Stay on Earth, and wait for something to kill us or do the job ourselves.
or
B. Expand into space, utilizing it's resources to have Humanity expand across Sol System, and the stars.
I'd really prefer option B. Although no government or official has looked that far ahead, perhaps with the exception of Kennedy.
If Humanity wishes to survive the next century, a permanent expansion into space is required. Overpopulation, War, Shortage of Natural Resources, and other problems are becoming common issues because we have nothing else to support Earth. As I mentioned in the other thread, the largest asteroids and comets in Sol System contain more fresh water than currently on Earth. Also, Mars' total surface area is equal to the amount of Earth's dry land.
Are you saying that if we get one too many people everyone will spontaneously die? Here's the thing about overpopulation: starvation can occur and that's about it. War maybe. But everybody won't just die. You seem to think that humanity is looking at a bright future in which everything gets better and more people are born and live more prosperous lives (save for overpopulation). You know, wars happen and people die. Population is low on my list of worries.
Taking comets and other space rocks from the Kuiper belt and smashing them into Venus precisely will add water and other metals, and slightly alter the climate over time.
Whoa! Did you just suggest moving large comets and asteroids all the way from the Kupier belt to Earth? Do you have any concept of how much energy that would take?
Energy to move the stuff to move the belt off of Earth: loads.
Energy to move that stuff all the way to the edge of the solar system: at least as much.
Energy to move that massive amount of material that massive distance: WAY more.
Factoring that much back into fuel that would have to be lifted off of Earth, it just gets ridiculous.
Just for your information, according to NASA, using current techniques just to go to Mars would require that 90% of the vehicle to be fuel. That's from Low Earth Orbit, not even taking into account getting that off the Earth.
None.