[chrispenycate]

Trees, skyscrapers and mirosoft.
Fungi need to get nourishment from their substrate, much like animals; they'll only go on growing while there's organic matter to digest.
But there are several photosynthetic plants that grow in low light conditions (not total darkness, obviously) including plants that generally grow beneath the canopy of rain forests of coniferous woods; they grow slowly, and frequently have dark coloured leaves to grab the maximum of available energy. Ivy, african violet, things like that.
There are going to be mass extinctions, though.

And somebody who comes from Seattle told me the cloud cover does occasionally clear, so you can see they put some mountains at the back of it, just never while I've been visiting.