Another issue is urban sprawl. This is where cities expand into rural areas, sometimes at a much faster rate than urban population growth.

另外一个问题是城市的随意扩张，城市向农村扩张速度有时候大大超过了城市人口增长的速度。

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At the same time, rural population growth rate but faster than the growth rate of urban population, which makes the limited arable land resources, scarcity become increasingly prominent.

与此同时，农村人口的增长速度却又要快于城镇人口增长速度，这就使耕地资源的有限性、稀缺性日益突出。

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