Population growth is a global phenomenon, and others worry about strains on the natural environment.
人口增长是全球现象，但是有人担心，人口增长给自然环境带来负担。
With the increase of the world population, our environment is getting worse and worse.
随着世界人口的增长，我们的环境变得越来越糟糕。
Population is the most fundamental factor in the big system of population, resources and environment.
人口是人口、资源与环境巨系统中最根本的因素。
For example, the problem of population, resources, environment, and so on.
如人口问题、资源问题、环境问题，等等。
For example, the problem of population, resources, environment, and so on.
如人口问题、资源问题、环境问题，等等。
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