If a subtropical-greenhouse were to be left in a British climate after a postapocalyptic event, what'd happen?

Question

I was just wondering, if mankind suddenly vanished over night, and say the temperature got slightly warmer by a degree or two via our contribution to the atmosphere before we left, would these subtropical paradises expand out of their greenhouse eventually? Or would it still be too cold for most subtropical plantlife to grow??

Answer 1

its happening now - its called evolution -the seas are so warm were getting more and more tropical species- farmers are experimenting now with various war climate foods.

All this poppycock about restoring the ozone layer and restoring climate wont happen- its too late- adjust to the new

order and be happy