The dream of the forest: SF Novel

More than one hundred years have passed since the cataclysm. The year is 2197 and Earth's surviving inhabitants now live in heavenly cities above the clouds, unwilling to descend back to the unstable surface.

Helen is a lawyer whose life is seemingly perfect, complete with a career, partner, and plans for a family. But she soon discovers that it is all an illusion. A car accident turns her life in a different direction and she finds herself on the Earth's surface, in a forested world utterly foreign to her.

Is it true that Earth cannot sustain life? What if the truth was entirely different? What if there were survivors - and how would Helen return to her own world?