Agriculture accounts for only a fraction of the GDP and employs an equally modest proportion of the workforce. Arable land is limited and the soil is generally poor—and the country remains dependent upon imported foodstuffs—but copra (from coconuts),cinnamon bark, vanilla, tea, limes, and essential oils are exported. Seychelles has a modern fishing industry that supplies both domestic and foreign markets; canned tuna is a particularly important product. The extraction of guano for export is also an established economic activity.