The UAE leadership has driven forward economic diversification efforts already before the oil price crash in the 1980s, and the UAE is nowadays the most diversified economy in the Middle East and North Africa (MENA) region. Although the oil and gas sector does still play an important role in the UAE economy, these efforts have paid off in terms of great resilience during periods of oil price fluctuations and economic turbulence. In 2018, the oil and gas sector contributed 26% to overall GDP. The introduction of the VAT has provided the Government with an additional source of income – approximately 6% of the total revenue in 2018, or 27 billion United Arab Emirates Dirham (AED) – affording its fiscal policy more independence from oil- and gas-related revenue, which constitutes about 36% of the total Government revenue. While the Government may still adjust the exact arrangement of the VAT, it is not likely that any new taxes will be introduced in the foreseeable future. Additional taxes would destroy one of the UAE's main enticements for businesses to operate in the country and put a heavy burden on the economy. The UAE emits a lot of carbon dioxide per person compared to other countries.