Tomatoes/Cucumbers etc have been grown in heated UK Greenhouses for decades for out of season eating.
The growers burnt oil, then after the oil hikes in the 70s, it was wood, then wood chippings into the 80s and early 90s, it just become uneconomical to build better more modern 'houses, the few that carried on are now finding it impossible to keep going, as the Govt wont help with energy costs.
My mum used to make tomato soups and sauces with the blemished ones - Yummy!
There are at least 4 derelict green houses within a mile of me, which provided some local kids w/e jobs when i was at school too.