Update: April, 09/2021 - 09:00 | Workers spread substances to curb odours from garbage at Nam Sơn landfill in Hà Nội s Sóc Sơn District. VNA/VNS Photo Mạnh Khánh HÀ NỘI Almost all landfills in Hà Nội are at bursting point – overloaded with garbage and causing a serious headache for local authorities. While officials say they are concerned about the growing mountain of trash, there are a number of new waste treatment centres close to beginning operations. And over the next 10 years, more high-tech landfill sites will be created. The biggest site in Nam Sơn opened in 1999 and covers an area of 157 ha with further expansions planned over the next thirty years.