假设你是李华，你的美国朋友Chris 给你发来e-mail，询问你校正在开展的“低碳生活”（low-carbon lifestyle ）活动情况。请就以下几个方面的活动内容用英语写一封回信。
1．上学（步行或骑自行车）；
2．校内（节电节水，双面书写）；
3．购物（使用环保购物袋）；
4．你对活动的看法。
注意：
1．词数120左右；
2．可适当增加细节，使行文连贯；
3．开头语已为你写好。
Dear Chris,
I’m happy to receive your e-mail asking about what we are doing to promote a low-carbon
lifestyle ．_______________________________________________________________________
_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua