Compressed natural gas-powered buses launched in Hanoi, Vietnam
Source: Xinhua| 2018-08-02 21:05:25|Editor: xuxin
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People sit on a compressed natural gas-powered bus in Hanoi, Vietnam, Aug. 1, 2018. Vietnam's capital Hanoi on Wednesday launched three routes of buses which use compressed natural gas (CNG) for the first time. (Xinhua/VNA)
