On the inside of a Dyson sphere there is effectively no gravity. Is there an alternative method to keep people on the inside surface from floating around?
I know it could spin and that would keep them down in a small ring around the equator, but is there a way to apply a 'downward' force equally? Could atmospheric density or buoyancy be reversed? Or maybe a fictional element is required?
It doesn't have to be 1g but the closer the better. To clarify, there is only 1 sphere, people live on the inside, the population is several orders of magnitude more than ours.
Edit: After a few answers, I'm starting to think I might need a graviton controlling element. Any suggestions?