人们担心温室效应给环境带来的巨大威胁的翻译：Fears that the greenhouse effect to the environment posed a tremendous threat 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

People worried about global warming a great threat to the environment

Fears that the greenhouse effect to the environment posed a tremendous threat

The people worried the greenhouse effect the huge threat which brings to the environment

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Fears that the greenhouse effect to the environment posed a tremendous threat