ocr: Strengths Diamonds: transformedBotswana from subsistence to niddle-income economy in 25 years; world's third- largest producer. High economic growth, averaging 113% - a year in 1980s. Prudent economic management. Large tinancial reserves. Copper, nickel,beef. ealesses Overdependence on diamonds (80% of export earnings; 50% of GNP).Weak agriculture andindustry. Small population, water shortages and drought addto diversitication problems. Adverse impact ofbeet industry on environment. High transportation costs to coast.