The Northern Hemisphere is one of the two hemispheres of Earth, located north of the equator. It is home to most of the world's landmass and population, and includes the Arctic Ocean, North America, Europe, and Asia. The term 'igloo' is used to refer to a type of shelter built by the Inuit people of the Arctic regions of the Northern Hemisphere. These structures are made from blocks of snow and ice, and are designed to provide protection from the cold temperatures and harsh weather conditions of the region.