Geography
Map references:
World, Time Zones
Area:
total area:
510.072 million sq km
land area:
148.94 million sq km
water area:
361.132 million sq km
comparative area:
land area about 15 times the size of the US
note:
70.8% of the world is water, 29.2% is land
Land boundaries:
the land boundaries in the world total 250,883.64 km (not counting shared boundaries twice)
Coastline:
356,000 km
Maritime claims:
contiguous zone:
24 nm claimed by most but can vary
continental shelf:
200-m depth claimed by most or to depth of exploitation, others claim 200 nm or to the edge of the continental margin
exclusive fishing zone:
200 nm claimed by most but can vary
exclusive economic zone:
200 nm claimed by most but can vary
territorial sea:
12 nm claimed by most but can vary
note:
boundary situations with neighboring states prevent many countries from extending their fishing or economic zones to a full 200 nm; 43 nations and other areas that are landlocked include Afghanistan, Andorra, Armenia, Austria, Azerbaijan, Belarus, Bhutan, Bolivia, Botswana, Burkina Faso, Burundi, Central African Republic, Chad, Czech Republic, Ethiopia, Holy See (Vatican City), Hungary, Kazakstan, Kyrgyzstan, Laos, Lesotho, Liechtenstein, Luxembourg, Malawi, Mali, Moldova, Mongolia, Nepal, Niger, Paraguay, Rwanda, San Marino, Slovakia, Swaziland, Switzerland, Tajikistan, The Former Yugoslav Republic of Macedonia, Turkmenistan, Uganda, Uzbekistan, West Bank, Zambia, Zimbabwe
Climate:
two large areas of polar climates separated by two rather narrow temperate zones from a wide equatorial band of tropical to subtropical climates
Terrain:
the greatest ocean depth is the Marianas Trench at 10,924 m in the Pacific Ocean
lowest point:
Dead Sea -408 m
highest point:
Mount Everest 8,848 m
Natural resources:
the rapid using up of nonrenewable mineral resources, the depletion of forest areas and wetlands, the extinction of animal and plant species, and the deterioration in air and water quality (especially in Eastern Europe and the former USSR) pose serious long-term problems that governments and peoples are only beginning to address
Land use:
arable land:
10%
permanent crops:
1%
meadows and pastures:
24%
forest and woodland:
31%
other:
34%
Irrigated land:
NA sq km
Environment:
current issues:
large areas subject to overpopulation, industrial disasters, pollution (air, water, acid rain, toxic substances), loss of vegetation (overgrazing, deforestation, desertification), loss of wildlife, soil degradation, soil depletion, erosion
natural hazards:
large areas subject to severe weather (tropical cyclones), natural disasters (earthquakes, landslides, tsunamis, volcanic eruptions)
international agreements:
selected international environmental agreements are included under the Environment entry for each country and in the Selected International Environmental Agreements appendix
