Compared to other regions, the Arab world has been experiencing one of the fastest population growth rates -- over 2% per year -- which has led to more than its doubling within the last 30 years. Worldfocus discusses Middle Eastern demographics with Patrick Gerland, a demographer at the United Nations Population Division.

Worldfocus contributing blogger Nina Hachigian argues that the Chinese have multiple reasons for the stance they are currently taking at Copenhagen. Leaders must respond to China's pressing demographic changes and safeguard its international image in the developing world.

Facing dual threats of low birth rates and soaring mortality rates, the ethnic Russian population is aging and dying. Worldfocus.org's weekly radio show explored Russia's population decline. Paul Goble, Vladimir Lensky and Louisa Vinton joined the conversation. Listen now.