The document is about igloos, which are homes made of snow and ice found in Arctic regions like Greenland, Canada, and the North Pole. The climate in these areas is very cold, windy, and snowy. Igloos are built from snow and ice because those are the main materials available in the freezing environment. Inuits, also known as Eskimos, are the people who traditionally live in igloos, using them as shelters when out hunting overnight.