This is owing to a number of factors, including the increased concentration of populations in areas of accelerated urbanization, and poverty, which often forces people to live in geographically unstable locations and in inadequate shelters.
这种情况有多种成因，其中包括人口日益集中于快速城市化地区。 此外，贫穷人口往往被迫生活在地质不稳定的地区，住房条件也不适当。