why are trees important (参考词语,take in carbon dioxide,oxygen,desert)
问题描述：
why are trees important (参考词语,take in carbon dioxide,oxygen,desert)
答
我是GROTESQUE1010：(请认真阅读,不要浪费我的写作苦心哦^@@^祝学习顺利）Trees are important because they give us two of life's essentials,food and oxygen.As we evolved,they provided additional necessitie...