these included a study to measure the effects of the phaseout as well a study identifying the countrys most polluting vehicles in the usasia environmental partnership usaep jointly sponsored a workshop in hanoi with the ministry of transport and the world bank to discuss phasing out leaded fuel and learn from the experiences of other east asian countries that had already phased out leaded gasoline the workshop helped to resolve concerns about leaded gasoline and led to the creation of a new partnership of government industry and academic experts the transition was accomplished in july