Total renewable water resources:
1.2 cu km (2003)
Freshwater withdrawal (domestic/industrial/agricultural):
total: 0.01 cu km/yr (48%/5%/47%)
per capita: 13 cu m/yr (1999)
Natural hazards:
cyclones possible during rainy season (December to April); volcanic activity on Grand Comore
volcanism: Karthala (elev. 2,361 m, 7,746 ft) on Grand Comore Island last erupted in 2007; a 2005 eruption forced thousands of people to be evacuated and produced a large ash cloud
Environment - current issues:
soil degradation and erosion results from crop cultivation on slopes without proper terracing; deforestation