(2008) The U.S. population is aging: The ratio of elderly to the working-age population in the United States will roughly double over the next few decades, straining the finances of the U.S. Social Security system and other government programs.
(2008) A new report from the Pew Research Center projects that immigration will propel the U.S. population total to 438 million by 2050, from 303 million today (see Figure 1). Along with this growth, the racial and ethnic profile of Americans will continue to shift—with non-Hispanic whites losing their majority status.
(September 2007) The world is on the verge of a shift: from predominantly rural to mainly urban.
(September 2001) Two decades into the AIDS epidemic in North America, the face of AIDS is darker and increasingly female.
(2001) Eco-tourism has emerged as one of the most important sectors of the international tourism industry. The United Nations, recognizing eco-tourism's potential role in sustainable development, has declared 2002 the "International Year of Eco-tourism."
(2006) Undernutrition remains a devastating problem in many developing countries—affecting over 815 million people and causing more than one-half of all child deaths.1 But while governments in these countries continue efforts to reduce hunger, that focus neglects the growing rate of overweight and obesity in the developing world.2
(February 2011) The percentage of Americans who smoke tobacco has fallen dramatically over the past 50 years.