Fuel, like food, is essential for human life. So what do you think the villagers burnt? It’s probably not what you first think of.
 :
Maybe they used coal
 :
No, I don't think there were any coal mines
 :
They would much more probably have burnt wood
 :
No, I think wood was quite precious to them
 :
Hmmmm
 :
maybe they used peat!
 :
They didn’t have coal or peat. There is plenty of peat here now but 5000 years ago peat hadn’t even formed. They would have burnt dried animal dung. And the sea would also have provided fuel - seaweed, once it had been dried, and the bones of stranded whales.