Hello All,
first post here and Civ IV newbie.
I am trying to finalize my first Civ IV game and have a couple questions. I used to play CIV DOS several years back and decided to jump in this nice game once more. Very pleased by the improvements. 
So, I followed the initial game's tutorial where it puts me against the PC. The game's AI put me against Ghandi.
I dominated his civilization and by experimenting several new game features while playing, got the Time Victory (which appears to be the easiest).
Decided to go beyond and play with a war scenario and also easily eliminated him. After that decided to build the spaceship to see where it would lead me.
I built the SS around 2150, after providing virtually all cities' features from lighthouse up to nuclear plants and distributing them to generate culture, research and wealth.
My questions are:
1) how do I launch the SS? I already have all the components, built in separate cities. Do I have to somehow bring them together? The info windows confirm I have everything but I do not see anything like the movies when we complete a wonder, etc.
2) I started the Future Tech research and am already around 2600 and it keeps developing "something" but I do nto see any new technology or stuff to build in the cities. Where is that research going? My "gold" generation is starting to decay and will get negative is nothing is done.
3) that brings to my last question. Almost all cities are in stagnant mode now and I am facing "global warming" with the green areas vanishing deserts spreading. Could nto find anything that would reverse it so the planet will get in a self destruction mode soon if nothing is done. Did not find any settings in the cities or anywhere else to add new technologies to reverse or mitigate this issue. Most cities still appear to be happy, since I keep getting those cheers celebrating the monarch day.
Ideas and guidance welcome.
Thanks!