Irrigated land: 12,370 sq km (1993 est.)
Natural hazards: earthquakes, landslides
Environment - current issues: air pollution from industrial emissions; rivers polluted from raw sewage, heavy metals, detergents; deforestation; forest damage from air pollution and resulting acid rain; soil contamination from heavy metals from metallurgical plants and industrial wastes
Environment - international agreements: party to: Air Pollution, Air Pollution-Nitrogen Oxides, Air Pollution-Sulphur 85, Antarctic Treaty, Biodiversity, Climate Change, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Nuclear Test Ban, Ozone Layer Protection, Ship Pollution, Wetlands signed, but not ratified : Air Pollution-Sulphur 94, Air Pollution-Volatile Organic Compounds, Antarctic-Environmental Protocol
Geography - note: strategic location near Turkish Straits; controls key land routes from Europe to Middle East and Asia
@Bulgaria:People
Population: 8,290,988 (July 1997 est.)
Age structure: 0-14 years: 17% (male 720,499; female 685,258) 15-64 years: 67% (male 2,769,288; female 2,823,431) 65 years and over: 16% (male 558,028; female 734,484) (July 1997 est.)
Population growth rate: -0.63% (1997 est.)
Birth rate: 8.05 births/1,000 population (1997 est.)