total: 6.63 cu km/yr (4%/1%/95%)
per capita: 316 cu m/yr (2000)
Natural hazards:
sandstorms and dust storms in summer
volcanism: Yemen experiences limited volcanic activity; Jebel at Tair (Jabal al-Tair, Jebel Teir, Jabal al-Tayr, Jazirat at-Tair) (elev. 244 m, 801 ft), which forms an island in the Red Sea, erupted in 2007 after awakening from dormancy; other historically active volcanoes include Harra of Arhab, Harras of Dhamar, Harra es-Sawad, and Jebel Zubair, although many of these have not erupted in over a century
Environment - current issues:
limited natural fresh water resources; inadequate supplies of potable water; overgrazing; soil erosion; desertification
Environment - international agreements:
party to: Biodiversity, Climate Change, Climate Change-Kyoto
Protocol, Desertification, Endangered Species, Environmental
Modification, Hazardous Wastes, Law of the Sea, Ozone Layer
Protection
signed, but not ratified: none of the selected agreements