How do you keep a igloo hot?

To keep an igloo warm, the key is to maximize heat retention and minimize heat loss. This can be achieved by insulating the walls with snow, which traps body heat, and placing a small fire or stove inside the igloo to generate warmth. Additionally, using materials like animal skins or blankets can help retain heat. Ventilation is also important to prevent carbon monoxide buildup from any fire, so a small opening should be maintained.