—Where are Maria and Kangkang? —They ___

书面表达。
根据下面表格的提示，写一篇题为”Saving the Earth”的不少于80词的英语短文，文章开关已给出，不计入总词数。

人类的不明智之举	1. 乱伐树木 2. 乱扔垃圾 3. 不加处理排放废气
导致的问题	1. 土地沙化 2. 河水变脏 3. 空气质量变差 4. 全球气温升高
建议	合理化建议至少两条

     rise 升高
Saving the Earth
As time goes by, man is making the earth sick. _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________.