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 Mariana Trench at 10,924 m in the Pacific Ocean
Elevation extremes: 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, the former USSR,
and China) pose serious long-term problems that governments and
peoples are only beginning to address
Land use:
arable land: 10%
permanent crops: 1%
permanent pastures: 26%
forests and woodland: 32%
other: 31% (1993 est.)
Irrigated land: 2,481,250 sq km (1993 est.)
Natural hazards: large areas subject to severe weather (tropical cyclones), natural disasters (earthquakes, landslides, tsunamis, volcanic eruptions)
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
Environment—international agreements: selected international environmental agreements are included under the Environment—international agreements entry for each country and in the Selected International Environmental Agreements appendix
People