dramatic fall in the price of tin during the early 1980s, which impacted one of Bolivia's main sources of income and one of its major mining-industries. The second major economic blow came at the end of the Cold War in the late 1980s and early 1990s as economic aid was withdrawn by western countries who had previously tried to keep a market-liberal regime in power through financial support.
Since 1985, the government of Bolivia has implemented a far-reaching program of macroeconomic stabilization and structural reform aimed at maintaining price stability, creating conditions for sustained growth, and alleviating scarcity. A major reform of the customs service in recent years has significantly improved transparency in this area. Parallel legislative reforms have locked into place market-liberal policies, especially in the hydrocarbon and telecommunication sectors, that have encouraged private investment. Foreign investors are accorded national treatment, and foreign ownership of companies enjoys virtually no restrictions in Bolivia.
Bolivia has the second largest natural gas reserves in South America. The government has a long-term sales-agreement to sell natural gas to Brazil through 2019. The government held a binding referendum in 2005 on the Hydrocarbon Law.
The US Geological Service estimates that Bolivia has 5.4 million cubic tonnes of lithium which represents 50%–70% of world reserves. The light metal is used to make high-capacity batteries used in electric cars and such. The spinoff effect of lithium mining could cause Bolivia to become the "Saudi Arabia of the Green World." However, to mine for it would involve disturbing the country's salt flats (called Salar de Uyuni), an important natural feature which boosts tourism in the region. The government does not want to destroy this unique natural landscape, to meet the rising world demand for lithium.
In April 2000, Hugo Banzer, the former President of Bolivia, signed a contract
