I always thought our current problem is not really producing energy but rather transporting it? So if you have a reactor in New York City it'll be rather useles

I always thought our current problem is not really producing energy but rather transporting it? So if you have a reactor in New York City it'll be rather useless for the people in, say, Moscow. That's the reason nobody is doing this power the world by establishing solar power plants in the Sahara project. Could someone clear this up?