Environment - international agreements:
party to: Air Pollution, Air Pollution-Nitrogen Oxides,
Antarctic-Environmental Protocol, Antarctic-Marine Living Resources,
Antarctic Seals, Antarctic Treaty, Climate Change, Desertification,
Endangered Species, Environmental Modification, Marine Dumping,
Marine Life Conservation, Ozone Layer Protection, Ship Pollution,
Tropical Timber 83, Tropical Timber 94, Wetlands, Whaling
signed, but not ratified: Air Pollution-Persistent Organic
Pollutants, Air Pollution-Volatile Organic Compounds, Biodiversity,
Climate Change-Kyoto Protocol, Hazardous Wastes
Geography - note:
world's third-largest country by size (after Russia and Canada) and
by population (after China and India); Mt. McKinley is highest point
in North America and Death Valley the lowest point on the continent
People United States
Population:
295,734,134 (July 2005 est.)
Age structure:
0-14 years: 20.6% (male 31,095,725/female 29,703,997)
15-64 years: 67% (male 98,914,382/female 99,324,126)
65 years and over: 12.4% (male 15,298,676/female 21,397,228) (2005
est.)
Median age: total: 36.27 years male: 34.94 years female: 37.6 years (2005 est.)
Population growth rate:
0.92% (2005 est.)
Birth rate:
14.14 births/1,000 population (2005 est.)
Death rate:
8.25 deaths/1,000 population (2005 est.)
Net migration rate:
3.31 migrant(s)/1,000 population (2005 est.)