Now environmental pollution has become a very serious problem the world is facing today.
现在环境污染已经成为当今世界面临的一个非常严重的问题。
The environmental pollution has become an important problem that the world has to be faced.
环境污染已成为当今世界所面临的一个重要问题。
Nowadays environmental problem has become one of the major problems that face the world.
环境问题已经成为当今世界面临的主要问题之一。
The environmental problem, at present, is an issue of the outlook on world and life.
人类当前所遇到的环境问题，是一个世界观和人生观的问题。
Environmental problem has already become the attention in the world in 21st century.
环境问题已经成为21世纪各国普遍关注的问题。
Environmental problem has already become the attention in the world in 21st century.
环境问题已经成为21世纪各国普遍关注的问题。
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