At the end of the 20th century, there were less than 1,000 natural gas vehicles in Iran. In 2003, the Iranian government decided to vigorously develop natural gas vehicles in order to save crude oil for export and formulated a development plan. Since 2004, the development of natural gas vehicles in Iran has been advancing by leaps and bounds. By 2011, the number of natural gas vehicles in Iran reached 2.859 million, an increase of more than 280 times over 2003, surpassing Pakistan to rank first in the world.

The Iranian government supports the modification of natural gas vehicles. Control the price of natural gas, and provide financial subsidies to natural gas for vehicles, and the price will remain below 50% of gasoline prices for a long time. To promote the use of natural gas vehicles to provide fiscal and tax policy support, in 2004 alone, 2 billion US dollars were allocated to promote the development of the natural gas vehicle industry. Tariffs will be reduced or exempted for imported natural gas vehicles and parts, and subsidies will be provided for the construction of gas filling stations. And vigorously develop natural gas vehicle engineering management and technical personnel training.

In 1980, Pakistan built the first CNG demonstration station in Karachi. Since the beginning of this century, natural gas vehicles have developed rapidly.

At the end of 2008, there were 2 million natural gas vehicles and 2,700 gas filling stations, ranking No. 1 in the world. The main reason for the rapid development of natural gas vehicles is that the government has formulated and implemented a series of incentive measures. Support the conversion of natural gas vehicles, vigorously promote the conversion of fuel engines to natural gas single-fuel engines, and more than 90% of natural gas vehicles are modified vehicles. Imported natural gas vehicles, equipment, and modified parts are all exempt from customs duties, and original natural gas vehicles are exempt from sales tax. The market price of CNG is controlled at a level 35% lower than that of diesel and 45% lower than that of gasoline. And speed up and simplify the approval of gas station construction projects.

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