Iron ore, limestone, clay and uranium ore are also present in commercially exploitable quantities. Hydroelectricity is the main source of power, supplemented by imported oil. Climatic effects, particularly recurrent drought, have exacerbated the situation. Some parts of the economy have shown growth during the late 1990s but these remain vulnerable to the wider security and political situation. Japan, the USA, and the UK are Sri Lanka's major trading partners.
Business attire is casual.
English is widely spoken in business circles. Appointments are necessary and it is considered polite to arrive punctually. It is usual to exchange visiting cards on first introduction.