(2019) More than 300 million people live in the United States and getting an accurate count of each and every one of them is no easy feat. As the U.S. population has grown—from just under 4 million in 1790 to more than 329 million in 2019—the Census Bureau’s enumeration methods (how they count people) have evolved to adapt to new technologies, increase efficiency and accuracy, and help to control rising costs.
2007) In 2005, about 191 million people—3 percent of the world's population—were international migrants, according to UN estimates.
(2010) Although sharing a land border with Greece and just across the Adriatic Sea from Italy, Albania was socially and politically isolated from the rest of Europe when it emerged from Soviet influence in the early 1990s.
(2007) The U.S. Census Bureau plans to eliminate the "foster child" relationship category on its questionnaires for the 2010 Census and the American Community Survey. They will be counted with other children, but foster children's characteristics as a group will not be available.
In February 2007, the Intergovernmental Panel on Climate Change (IPCC), a panel of international experts assessing the current scientific knowledge on climate asserted that warming of the earth's climate system is "unequivocal."1