Thought of this during Science today.
It is a large ring. (no, not Halo, more of a large space station shaped like halo)
My ring, is pretty much a city. It contains everything required to live on it. It can accommodate thousands, maybe even millions of people after it's construction is complete. It can manufacture pretty much ANY required resource you may need up there, and has everything you need to use it.
Now, for the main part:
You know all those problems with Global Warming and all that shit? Well, all those problems can be SOLVED. Due to the size of the ring, and outer solar panels on the outside of the ring, there will always be a side of it facing the Sun, meaning infinite, renewable, free, and clean energy! The energy collected from the panels will be more then enough to power all of Earth, and all of the ring. The energy will be transferred into large cells, probably a battery shaped cell, 1m in length and a radius of 25cm. These cells will then be transferred down to Earth for the use of everything from cars to large industries.
These cells, being highly advanced, will be able to hold extreme amounts of energy. Everything on Earth will then be converted to be able to use these cells. Cars will be powered entirely on the cells, and one cell will be able to power one car from anywhere from a few days up to a month, depending on how much you use your car.
As well as that, my ring will be a large orbital defense weapon, capable of destroying nearly anything that comes into Earth's airspace, unauthorized.
There, now what do you guys think about my plans for world domination, uh, I mean, my new ring...? Good, well now you can all help me build it, starting with purchasing the required materials.
P.S, I didn't know where else this would belong, so I decided to post it here. If it is wrong, please correct.