It is mainly oil, which accounts for 60% of all the countries' revenue. Another - although in terms of revenue much smaller - economic activity is agricultural: producing fruits, grains and wine.
agriculture,as it is an OPEC member most of its income comes from the oil and petrol.
what are the club's main source of income
what is the income of Indiana
Personal income tax
what is the main source of income in israel
Cattle
Oil
refineries
Balls
bacon
Welfare.
Banking, casinos and the service industry ( restaurants, stores etc) are the main sources of income.
The main source is tourism.