求翻译：100年前，人类仍与自然和谐相处。今天这种和谐的关系正在面临危险。由于缺乏远见、计划不周、粗心大意和贪得无厌，人类正在逐渐毒害着环境。是什么意思？

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100 years ago, mankind is still live in harmony. Today, this harmonious relationship is at risk. Because it lacks vision, poor planning, careless and greedy, human beings are gradually poison environment.

100 years ago, the humanity harmoniously was still together with the nature.Today this kind of harmonious relations faced with danger.Because lacks the foresight, the plan not week, careless and is insatiably greedy, the humanity is poisoning the environment gradually.

100 years ago, humans live in harmony with nature. Today this harmonious relationship is at risk. Due to the lack of vision, poor planning, carelessness and greed, mankind is slowly poisoning the environment.

100 years ago, the mankind still and naturally co-existed in harmony. Such harmonious relation is facing the danger today. Because of lacking the foresight, not well planned, careless and insatiably avaricious, the mankind is poisoning the environment gradually.