假设你是红星中学高三(1)班的班长李华，你们全班同学在暑假期间开展了“体验一天低碳生活”的活动。请你根据以下四幅图的先后顺序，写一篇英文短文，介绍同学们这一天的体验活动，并谈谈自己的感受。短文的开头已为你写好。词数不少于120。
提示词：disposable chopsticks 一次性筷子    air conditioner 空调

A Low-carbon Day
The students in our class took part in an activity of “Experience a Low-carbon Day” during the summer vacation. …___________________________________________________________________
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