四 环保交流分享会
欢迎来到环保交流分享会。请你根据下面的写作框架和在“环保先锋养成记”中所学的单词、短语和句型，撰写一份英文环保倡议书，向全校师生发出倡议，呼吁大家从身边小事做起，保护环境，共建绿色校园。（80词左右，已给出的句子不计入总词数）

Dear teachers and schoolmates,
I’m writing to call on everyone to
However, we can take action to change.
Let’s work together! Every small effort counts. By doing these things, we can make our campus greener and contribute to a better environment.

第一处横线：protect our environment and build a green campus. At present, we are facing small but noticeable problems in school, such as littering and serious waste of water, electricity and paper.
第二处横线：We can turn off the taps and lights in time when no one uses them. We can use both sides of paper, and sort the waste correctly. We should also pick up rubbish around us to keep the school clean.

这是一篇校园环保主题的倡议书，需严格按照给定的写作框架完成内容补充：1. 开头部分点明共建绿色校园的核心主题，引入当前校园中存在的资源浪费、随手乱扔垃圾等常见环境问题，贴合倡议的场景；2. 主体部分列举几项师生日常很容易践行的校园环保小事，内容贴近学生生活，使用八年级已学的环保相关词汇、短语即可；3. 整体补充内容的词数控制在80左右，语言简洁通顺，符合倡议书的呼吁语气。