Answer:
Some of the more sparsely populated regions of the world are found in Afghanistan, Syria, Iraq, the Arctic Circle, the Sahara, the Himalayan region of Asia, Iceland, Northwest Africa, the Outback of Australia, and Mongolia.
Macao, Monaco, Singapore, Hong Kong and Gibraltar are the five most densely populated. Singapore has nearly 8,000 people per km2 – more than 200 times as dense as the US, and 2000 times that of Australia.
