Hanoi (VNA), Oct. 23 -- Urban railways are an effective means of transport that will help cut greenhouse gas emission s in Hanoi and HCM City, which have both experienced serious air pollution in recent years, according to a survey by the Japan International Cooperation Agency (JICA).

The survey was conducted from February 2019 to September 2020 regarding Hanoi's metro lines No 1 and No 2 and HCM City's metro line No 1, which are being built using Japanese ODA, and was released at a workshop in Hanoi on October 23.

JICA experts estimate that Hanoi's metro lines have the potential to lower carbon emissions by more than 94,000 tonnes per year, while the southern hub's line may contribute a 56,877-tonne reduction each year.

JICA Chief Rep...