2. This would be horrible. I hope we find extra living space in the form of other planets when the time comes, rather than smuther the earth.
I think the future will probably just be the same as it is now, except the physical appearance of things might look different. The ideological aspect of humans will most likely still be the same though. It will be the rich countries who lead the way in exploration and the poor countries will still stay poor. It will also most likley be people from wealthy countries who eventually colonise other planets.