Party to: Air Pollution, Air Pollution-Nitrogen Oxides, Air Pollution-Sulphur 85, Air Pollution-Volatile Organic Compounds, Antarctic-Environmental Protocol, 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-Persistent Organic Pollutants, Air Pollution-Sulphur 94, and Climate Change-Kyoto Protocol

Other International Issues

Trafficking
Drugs: key entry and transit point for South-west Asian heroin and some South American cocaine bound for European markets, and Bulgaria is itself a limited producer of precursor chemicals.
Women: major supplier and transit point for women being smuggled into Asia, Western and other Eastern European prostitution rings and "escort services".

Other Facts for visitors

Time zone: GMT +2 hours (March-October set one hour ahead)
Weights and measures: metric system
Electricity: 220v, 50 Hz; regular round 2-pronged continental Euro plug