【猜題理由】隨著經濟的高速發展，社會自然環境遭受嚴重污染。環保意識的培養和環保工作的開展成為國人，乃至世人共同關注的熱點和焦點。對環保問題而言，"只要人人獻出一點愛，世界將變成美好人間 !"此話題為學生熟知，與高中生的生活實際貼近，而且具有一定的開放性，使得每個學生都能夠有話可說，符合新課標理念下的命題方向。

　　【構思點撥】首先簡要介紹環保問題之重要，號召同學們行動起來，共同參與環保活動;其次就環保發出倡議，并征召志愿者。這樣既把考生限定在一定范圍之內，又給予了考生相當的發揮的自由，有助于考生的作文脫穎而出。

　　【參考例文】

　　15 May, 2010

　　Dear brothers and sisters,

　　On behalf of the University Students' union , I, the Chairman of the union , am earnestly calling for your active participation in our environmental protection campaign. It is the duty of every global villager; man just can not sustain his glorious civilization without a rewarding environment, which will be possible only if man makes considerable efforts to protect the environment.

　　Do you cherish precio us opportunities to volunteer in our joint efforts in environmental protection? Here is a great one not to be missed by any enthusiastic youth; Right next Saturday, our university is to run a publicity campaign to advocate environmental protection across the city. The University Students' union will be in charge of recruitment of volunteers. Let's join our hands and take action immediately.

　　Yours sincerely,

　　Li Hua