Igloos had no fires because there was not much firewood in the arctic. Some driftwood might have washed up on the shores, but if the Inuit did not live close to the sea, they would not have found it.

Their houses, whether of snow or earth ... Even when Arctic blizzards are blowing overhead, the body-heated igloo often keeps so warm that the Eskimos snug inside need wear no clothes at all.

The answer is of course, an igloo! 'Igloo' is an Inuit word for 'snow house', and 'Inuit' is the word that describes the people who live in the frozen lands of northern Canada, Alaska and Greenland.